Question

the minute hand of a clock is 9.5cm long. How far will the tip of the hand travel in one day

Answer 1

Do you knw the formula to calculate the circumference of a circle from its radius?

Answer 2

i do know the formula for area but when i do it the answer just isnt right

Answer 3

It is not area you want, it is the circumference - all the way round the circle

Answer 4

is the circumference formula c=pi D?

Answer 5

yes - or another way to put it is C= 2*pi*r (because D= 2r)

So you know the radius = so calculate eth circumference.

This is how far the tip travels for ONE trip around the clockface.

How many times does it go around in 1 day?

Answer 6

twice.. so you times it by 2?

Answer 7

The question asks about the 'minute hand' - your answer is for the ' hour hand'

How many times does the 'big hand' go around in 1 day?

Answer 8

its 24 times you times it by 24?

Answer 9

Correct
So oyur answer is

2* pi * r *24

Answer 10

so its 2 (pi) (9.5) (24) ?

Answer 11

try it

Answer 12

i did it it came out as 1432.56625

Answer 13

is it correct?

Answer 14

You need to put in units.

(note the centimetres are not an 'approved' unit - but would probably be OK for this question because they gave you the radius in cm)

I haven't checked your calculation - but the formula you wrote was correct

Answer 15

Also - you have tooo many decimal places.....

Answer 16

but the thing is that my sheet gives the answer and question and oyu have to do the formula your self and the answers say 68m

Answer 17

and when i convert it to m it comes out as 14.325m

Answer 18

Hmm - I have checked your calculation and it is correct.

The method I gave is also correct.

IF the answer you have is correct then

Distance = 68m = 24* C
Therefore C= 2.83m

If c= 2.83m = pi*D then D = 2.83/pi = .91m= 91cm so r= 45.5cm

I cannot see how that answer can be correct

Answer 19

hmm mebe a typo

Answer 20

but thanks soo much!!

Answer 21

np