SOLUTION: two cyclists are competing in a race of 8 km on a circular track of radius 25 metres. they begin at the same time. one biker's average speed is 40 km/h while the other bikers avera
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Question 676402: two cyclists are competing in a race of 8 km on a circular track of radius 25 metres. they begin at the same time. one biker's average speed is 40 km/h while the other bikers average speed is 48 km/h. how many laps will the slower cyclist have left to complete after the faster cyclist finishes?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
two cyclists are competing in a race of 8 km on a circular track of radius 25 metres.
they begin at the same time. one biker's average speed is 40 km/h while the other bikers average speed is 48 km/h.
how many laps will the slower cyclist have left to complete after the faster cyclist finishes?
:
Find how long for the winner complete the race
8/48 * 60 = 10 minutes
:
Find how many meters the loser goes in 10 min (1/6 hr)
40 * 1/6 * 1000 = 6666.67 meters
:
Find his distance from finishing 8000 meters
8000 - 6666.67 = 1333.33 meters
:
Find the circumference of the track with a 25 meter radius
2*pi*25 = 157.08 meters
:
find how many laps in 1333.33 meters
1333.33/157.08 ~ 8.5 laps to go, when the winner finishes
:
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