a wheel, including the tyre, has a radius of 26cm. how many complete revolutions will the wheel make in travelling 1km? can you explain how to work this out, thanks :-)

Question

amistre64 · Answer

tyre eh... sound british

anonymous · Answer

See when the whell makes one revo, the cart travels 2pi(r) distance/ 
so the no of revolutions is n then
2pi(r)(n) = 1000m

amistre64 · Answer

convert 1 km into cm; or the other way around

anonymous · Answer

formula for ircumference of a circle is C=2pi*r
you have the value for r=26 cm = .26 km
to find complete revolutions:
n=1/(2pi*.26)=...
solve it

anonymous · Answer

oups....
1 km = 100,000 cm, so 26 cm = 0.00026 km
please correct the above

anonymous · Answer

1000/(2*pi*0.26)

anonymous · Answer

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