Question 783767: You have 6 hours to travel a distance of 140km by bike
a. How long will it take you to travel the first half at an average speed of 21 km/h
b. In the second half of the ride, you need to increase your average speed to make up for lost time. If you can maintain an average speed of 25 km/h, will you be able to reach your destination on time?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! You have 6 hours to travel a distance of 140km by bike
a. How long will it take you to travel the first half at an average speed of 21 km/h
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distance = 70 km ; rate = 21 km/h ; time = d/r = 70/21 = 10/3 = 3 1/3 hours
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b. In the second half of the ride, you need to increase your average speed to make up for lost time. If you can maintain an average speed of 25 km/h, wil
you be able to reach your destination on time?es
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distance = 70 km ; rate = 25 km/h ; time = d/r = 70/25 = 2.8 hrs
= 2 hrs 48 minutes
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Cheers,
Stan H.
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