SSC CGL 9 Aug 2015 Shift 2 Paper

Question : 145 of 200

Marks: +1, -0

A boat can travel with a speed of 13 km/hr in still water. If the speed of stream is 4 km/hr in the same direction, time taken by boat to go 63 km in opposite direction is

9 hrs
4 hrs
7 hrs
3 $9/{17}$ hrs

Validate

Solution:

Rate upstream of boat
= 13 – 4 = 9 kmph
∴ Required time =

{\Distance}/{\Speed}

{63}/9

= 7 hours

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