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  1. 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 me to ride both ways ?
    1. 30 minutes
    2. 19 minutes
    3. 37 minutes
    4. 20 minutes
Correct Option: B

On the basis of given details in question ,
Walking + Riding ≡ 37 mintues ...(i)
2 × Walking ≡ 55 minutes ...(ii)
By equation (i) × 2 – equation (ii), we get
2 × Riding = 2 × 37 – 55 = 74 – 55 = 19 minutes



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