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Start the planA cyclist travels 20 miles at a speed of 15 miles per hour. If he returns along the same path and the entire trip takes 2 hours, at what speed did he return?
A. 15 mph
B. 20 mph
C. 22 mph
D. 30 mph
E. 34 mph
The OA is D.
I solve this PS question as follows,
A cyclist travels 20 miles at a speed of 15 miles per hour
Time taken while going= Distance/Speed = 20/15 hrs = (4/3)hrs
Total time = 2hours
Time taken while returning = total - time taken while going = 2 - 4/3 = (2/3)hrs
Distance = 20miles
Time = (2/3)hrs
Speed = Distance/Time = 20/ (2/3) = 30 miles/hr
So, Answer is D.
Please, can anyone explain another way to solve this question? Thanks!
A. 15 mph
B. 20 mph
C. 22 mph
D. 30 mph
E. 34 mph
The OA is D.
I solve this PS question as follows,
A cyclist travels 20 miles at a speed of 15 miles per hour
Time taken while going= Distance/Speed = 20/15 hrs = (4/3)hrs
Total time = 2hours
Time taken while returning = total - time taken while going = 2 - 4/3 = (2/3)hrs
Distance = 20miles
Time = (2/3)hrs
Speed = Distance/Time = 20/ (2/3) = 30 miles/hr
So, Answer is D.
Please, can anyone explain another way to solve this question? Thanks!
