42.A
boat running downstream covers a distance of 16 km in 2 hours while for
covering the same distance upstream, it takes 4 hours. What is the speed of the
boat in still water?
A. 4 km/hr B. 6 km/hr
C. 8 km/hr D. Data inadequate
Answer: Option B
Explanation:
|
Rate
downstream =
|
|
16
|
kmph
= 8 kmph.
|
|
2
|
|
Rate
upstream =
|
|
16
|
kmph
= 4 kmph.
|
|
4
|
|
Speed
in still water =
|
1
|
(8
+ 4) kmph = 6 kmph.
|
|
2
|
