Two friends travel 150km and 200km in time 6 hours and 5 hours respectively. What is the ratio of their average speed?

(D) 5 : 8

Explanation

average speed of first friend = 150/6 = 25km/h and average speed of the second friend is 200/5 = 40km/h. So the ratio of their speed will be 25:40 or 5:8

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