Question

the veranda is covered with tiles(30cm times 30cm) in 5 black and4 white tiles,how many black tiles are used to cover the veranda floor if that pattern is continued

Answer 1

what is the total area of the veranda?

Answer 2

the area is 4,2m time 1m=4,2m

Answer 3

total area = \[4.2\operatorname{m}^2\]?

Answer 4

the total area is 4.2 \[m ^{2}\]

Answer 5

do you have an answer?
I get 25 but I am rounding down as the answer I got is not an integer...

Answer 6

so the answer is 25 black tiles

Answer 7

Veranda is covered with tiles (30cm times 30cm): is 30 by 30 the measurement of each tile?

Answer 8

yes in cm

Answer 9

good, a centimeter is 1/100 of a meter. You said that the enire veranda is 4.2 meters squared right?

Answer 10

yes.

Answer 11

.03 (.03) = .0009 m^2 right?

Answer 12

yes because you converted the cm to m

Answer 13

thats my error... it should be .3(.3) = .09 m^2

Answer 14

yes, we need to convert centimeters to meters to be able to determine how many m^2 one tile covers

Answer 15

you right it is 0.3 because 30/100 =0.3m

Answer 16

.09x=4.2?

x = 4.2/.09 = 420/9


which is 46 and 2/3 tiles all together

Answer 17

I know that 7 times 6 is equal to 42; so I assume that this veranda is NOT a square. and that it is either .6 meters by 7meters, or .7meters by 6 meters. Would that be a fair assumption to you?

Answer 18

the veranda lenght is 4,2m by breadth 1m

Answer 19

4.2 by 1 meter? thats good too :) either way we need 46/23 tiles all together.

Answer 20

@amistre, is area under any curve found out by integrating the function?

Answer 21

@think; yes. When we integrate a function, we are adding up all the little slices that it is made of. Which would equal its area.

Answer 22

I get 3 and 1/3 tile in 1 meter.

Answer 23

okay, so integrating=finding the area & differentiating= ?

Answer 24

differentiating is ....finding the rate of change with respect to another variable. Differentiate with respect to (x) or (time). And thats finding the derivative.

Answer 25

and I get 14 tiles to fit in 4.2 meters

Answer 26

14(.3) = 4.2 right?

Answer 27

30cm * 30cm=900cm
900cm divide by 100m =9m*4,2m= 40 tiles

Answer 28

cant do it like that; you have to realize that the area changes and you no longer deal with 900 cm..

each tile is .3 meters wide; (.3)(.3) = .09 m^2 you have to use this measure of area. otherwise you mess yourself up. Does that make sense?

Answer 29

900cm^2 is not easily converted to m^2 so convert it before you find the area.

Answer 30

oh okay so the answer u gave me the 1st one is right

Answer 31

Yes. .3 meters wide by .3 meters deep.

.3x = 4.2
x = 14 tiles along the 4.2 meter side.

.3x = 1
x = 1/.3 = 10/3

x = 3 and 1/3 tile to span 1 meter side.


Do you agree with those numbers?

Answer 32

yep,thanks i'll tel you the feed back tomrw ,pls help me with the last two parts of my homework

Answer 33

black = 22 and white = 21 and 1/3 by those measurements

Answer 34

whats the last two parts of your homework?

Answer 35

Doh, I drew 13 tiles...let me reccount that..

Answer 36

its going on grt though...

Answer 37

You need 23 and 1/3 black tiles and 23 and 1/3 white tiles.

Better buy 24 :)

Answer 38

24 black tiles.right ...the front of the roof is in the shape of a isosceles triangle.the side of the roof are 50cm longer at the ends of the roof hiegh is 1,7m .calculate the lenght of the sides of the of the triangle

Answer 39

is the height from ground level to the peak or is it from the ceiling line to the peak? This information only makes sense if we have a triangle that has a height of 1.7m and has little (50cm) overhangs extending beyond the base. Is the right?

Answer 40

from the ceiling line to the peak.thats right the triangle height is 1,7m yes you right

Answer 41

An isoTriangle has 60 degree corners; and the the sin(60) = 170cm/x(cm)

x = 170/sin(60); then add the 50cm to get:

x = 170/sin(60) + 50. Does that work for you?

Answer 42

explain more

Answer 43

246.3 cm is the answer I get.

But to explain more:

Have you learned about sine, cosine, and the functions of angles yet?

Answer 44

or just the pythagorean theorum?

Answer 45

no

Answer 46

Do you know the pythagorean theorum then?

x^2 + y^2 = r^2 ?

Answer 47

@amistre, do u know DeMorgan's laws?

Answer 48

i dont know them

Answer 49

@think; I have vaguely seen it, but I havent gone over it any. Whats it about?

Answer 50

its related to sets & functions

Answer 51

dont we start by converting the 50cm to meters

Answer 52

Kab: in order to solve this problem; you need to know how to solve right triangles. and you solve them with a formula that says the height^2 + base^2 is equal to the slanted part^2

Answer 53

@think; not in my repetoire yet :)

Answer 54

and a right triangle is just half of a square. do you know that?

Answer 55

bye guys..u both cont..gotta go

Answer 56

Ciao think :)

Answer 57

all d best wid ur discussion c u 'll the nxt time

Answer 58

(H)^2+(B)^2
(1,7)^2+(0,05)^2
2.89m+0.0025m=2.89m^2
i converted the 50cm to meter which is 0,05

Answer 59

you are on the right track, but I have to point something out to you first.

for starters the 50 sm is something we will add at the end because it is not a part of the triangle to begin with.

second; we dont know the B yet in order to find the length of the side of the roof. But we do know (because it is an isosolec(sp?) triangle) that the length of the roof is twice B.

So lets set up out formula like this:

(1.7)^2 + B^2 = (2B)^2

1.89 = 4B^2 - B^2

1.89 = 3B^2

1.89/3 = B^2 ...now square root both sides.

sqrt(1.89/3) = B

the length of the roof is twiceB

2(sqrt(1.89/3)) = 2B = length of one side of the roof; after you get this number add the overhang of (50cm.)

Make sense?

Answer 60

to make things easy for me may you please give the the hole sum and answer

Answer 61

Yes,

If I did it correctly; I get

2(170)/sqrt(3) + 50

196.3 cm + 50 cm = 246.3 cm is the roofs length on each side.

or 2.463 meters

Answer 62

do you stil have time for the last one, calculate the lenght and breadth of the parallelogram

Answer 63

I got lotsa time... at least 4 hours :)

Answer 64

lets go over to that posting for it tho.