IBPS SO Prelims Exam Model Paper 9

Given:
Time taken to travel 72 km upstream = 8 hours
Time taken to travel 72 km downstream = 4 hours
Formula used:
Speed =

Distance

Time

Speed of boat in still water =

(Upstream‌speed+Downstream‌speed)

2

Calculation:
Speed of boat in upstream =

72

8

= 9 kmph
Speed of boat in downstream =

72

4

= 18 kmph
∴ Speed of boat in still water =

(9+18)

2

=

27

2

= 13.5 kmph