A man travels a distance of 10 miles at 20 miles per hour and returns over the same route at 30 miles per hour. What is his average speed for the round trip in miles per hour?

dsuc.created: 7 years ago | dsuc.updated: 1 week ago

dsuc.updated: 1 week ago

Mercantile Bank Ltd Mercantile Bank Ltd - Officer - 2004 গণিত গড় (Average)

dsuc.explanation

579

common.best_ans:

let, x = 20 miles/hr

y = 30 miles/hr

we know,

average speed = 2xy/(x + y)

= 2*20*30/(20 + 30)

= 1200/50

= 24 miles/hr (ans)

7 years ago

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Md Azizur Rahman

common.founder_of_satt

গণিত

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