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The wheel of a car has an outer radius of 25 cm. Calculate:
a) How far the car has travelled after one complete turn of the wheel
b) How many times the wheel turns for a journey of 1 km
help plz idk how to solve this
thx

 Jun 7, 2021
 #1
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Circumference of a circle (the wheel) is   

       pi * d    =   pi * (25 *2) = 50 pi   = 157 cm   = 1.57 m   = .00157 km     for ONE turn.

 

 

  b)    1 km / .00157 km/turn = 636.62 turns   

 Jun 7, 2021

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