Jack cycled the first half of a 20 mile race at an average speed of 25 miles per hour. He cycled the second half of the race at an average speed of 20 miles per hour. How many minutes did it take Josh to finish the race?
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Answer: 54 mins
Step-by-step explanation:
10miles=20mph
10miles=25mph
S*T=D
1. 20*x=10
x=1/2-0.5=30mins
2. 25*x=10
x=2/5=0.4=24 mins
30+24=54mins
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