SOLUTION: Billy likes to go cycling. His bike has wheels of diameter 85cm. He has invented a counter for his bike, which counts the number of revelations the wheel makes. One day the

Question 574537: Billy likes to go cycling.
His bike has wheels of diameter 85cm.
He has invented a counter for his bike,
which counts the number of revelations the wheel makes.
One day the counter shows 240 revolutions.
How far has billy cycled?
give your answer to the nearest metre.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
His bike has wheels of diameter 85cm.
He has invented a counter for his bike,
which counts the number of revelations the wheel makes.
One day the counter shows 240 revolutions.
How far has billy cycled?
give your answer to the nearest metre.
---------------
Circumference = pi*85 cm
d = 240*85*pi = 20400*pi cm = 204*pi meters
d =~ 641 meters
------------------
You can buy those for ~ $20, they show speed and distance. No need to invent it. It works well on bicycles, but adapting it to rollerblades is not easy.
RELATED QUESTIONS
Billy likes to go cycling. His bike has wheels of diameter 85cm. He has invented a... (answered by fractalier)

Billy likes to go cycling. His bike has wheels of diameter 85cm. He has invented a... (answered by fractalier)

billy likes to go cycling his wheels have a diameter of 70cm he has invented a counter... (answered by Zucchini)

Billy likes to go cycling. His bike has wheels of diameter 75cm. He has invented a... (answered by richwmiller)

Billy likes to go cycling. His bike has wheels of diameter 75 cm. He has a counter on his (answered by greenestamps)

Billy likes to go cycling. His bike has wheels of diamiter 75cm. He has a counter on his... (answered by ikleyn)

Billy has a bike wheels are 75cm in diameter He has invented a counter to count the... (answered by Alan3354)

Bill's bike wheels have a 26-in. diameter. The odometer on his bike counts the number of... (answered by josgarithmetic,MathLover1,math_tutor2020,ikleyn)