1.

Two friends P and Q are running in opposite direction from A to B and another from B to A . Speed of P is 8/5 of speed of Q . After meeting each other , if P takes 3.5 hours to reach B then what will be the time taken by Q to reach A after meeting ?

Answer»

8.96 hours
9 hours
9.20 hours
10 hours

SOLUTION :We KNOW that `(S_(1))/(S_(2)) = sqrt((t_(2))/(t_(1))) = (8)/(5) = sqrt((t_(2))/(3.5))`
`= (64)/(25) = (t_(2))/(3.5) implies t_(2) = 8.96` hours


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