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Question

I walk a certain distance and ride back taking a total time of 37 minutes. I could walk both ways in 55 minutes. How long would it take ride back both ways?

A
19
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B
21
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C
20
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D
13
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Solution

The correct option is A 19
Walk + ride =37 minutes..........(i)
walk + walk =55 minutes
2× walk =55 minutes
walk =552=27.5 minutes......(ii)
Putting eq (ii) in eq (i)
27.5+ ride =37
Ride back =3727.5=9.5
2× ride =9.5×2=19 minutes.

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