AFCAT Model Paper 6

Given:
The boat travels 39 km upstream in 6.5 hours
The boat travels 95 km downstream in 9.5 hours
Formula Used:
Speed of boat in still water =

(Upstream‌Speed+Downstream‌Speed)

2

Calculation:
Using the formula, Speed =

Distance

Time

⇒ Upstream Speed =(

39

6.5

) kmph = 6 kmph
⇒ Downstream Speed =(

95

9.5

) kmph = 10 kmph
Speed of boat in still water =

(Upstream‌Speed+Downstream‌Speed)

2

⇒

(6+10)

2

⇒ 8 kmph
∴ Speed of the boat in still water = 8 kmph