Question

The surface area of a rectangular prism is 150 cm². If all the sides are tripled, what will the new surface area be?

Answer 1

Surface Area = 2Lw + 2wh + 2Lh = 150cm²

where:
L = length
w = width
h = height

So, if you new sides are trippled:

Surface Area = 2(3L)(3w) + 2(3w)(3h) + 2(3L)(3h)
= 18Lw + 18wh + 18Lh

Set up the ratio of new surface area to old:

(18Lw + 18wh + 18Lh)/(2Lw + 2wh + 2Lh) = Area/150

and solve for Area.

Answer 2

then divide

Answer 3

no 150 didu read above

Answer 4

2.77777

Answer 5

round it and get 2.7 dou have answer choices

Answer 6

nope.

Answer 7

its an explain question

Answer 8

ok then lets go with 2.7

Answer 9

alright 2.7cm

Answer 10

right 2.7cm?

Answer 11

yep

Answer 12

how about this problem

The volume of a rectangular prism is 183 in³. What is the volume of a pyramid which has the same height and a congruent base?

Answer 13

Prism Volume = Lwh
Pyramid Volume = 1/3(Lwh)

Answer 14

1/3 (183)?

Answer 15

yes thats rite

Answer 16

i got 61in^3

Answer 17

Find the surface area of a small juice can whose diameter is 4 inches and whose height is 6.25 inches. Use 3.14 for π. Hint: The can is a cylinder.

Answer 18

Surface Area of a Cylinder = 2πr² + 2πrh

where
r = radius: d/2
h = height

Answer 19

ok os what do i do now

Answer 20

2(3.14) * 2(3.14)?

Answer 21

yes an when u get the answer message me srry im in high demand i have 10 more people to help

Answer 22

i got 39.4384

Answer 23

@pooja195

Answer 24

correct

Answer 25

yes.

Answer 26

The volume of a right circle cone is 800 mm³ and its radius is 5 mm. Find the height of the cone. Use 3.14 for π.

Answer 27

base area = radius² x 3.14
base area = 8² x 3.14
base area = 64 x 3.14
base area = 200.96

volume = base area x height : 3
height = 3 x volume : base area
height = 3 x 500 : 200.96
height = 7.46

Answer 28

mm

Answer 29

area = 4 π r²
area = 4 π 0.25²
area = 4 π 0.0625
area = 0.25 π

Answer 30

yep good job