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 =37−27.5=9.5 2× ride =9.5×2=19 minutes.