Question : Sameer walks a certain distance and rides back taking a total time of 40 minutes. He could walk both ways in 70 minutes. How long would it take for him to ride both ways?
Option 1: 7 minutes
Option 2: 5 minutes
Option 3: 10 minutes
Option 4: 15 minutes
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Correct Answer: 10 minutes
Solution : Let the time it takes Sameer to walk one way as W and the time it takes him to ride one way as R. Given that he walks one way and rides back in 40 minutes. ⇒ W + R = 40 Given that he could walk both ways in 70 minutes. ⇒ 2W = 70 ⇒ W = 35 Substituting W = 35 into the first equation gives: ⇒ 35 + R = 40 ⇒ R = 5 Therefore, it would take Sameer 5 minutes to ride one way. So, it would take him 2R = 2 × 5 = 10 minutes to ride both ways. Hence, the correct answer is 10 minutes.
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