14.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:
|
Rate
Downstream
|
=
(16 / 2) kmph
|
|
= 8
kmph
|
|
Rate
upstream
|
=(16
/ 4) kmph
|
|
= 4
kmph.
|
|
Speed
in still water
|
= 1
/ 2 (8 + 4)kmph
|
|
=
1/2 x 12
|
|
= 6
kmph.
|
