7
Q:
A) 6 km/hr | B) 3 km/hr |
C) 2 km/hr | D) 4.5 km/hr |
Answer: C) 2 km/hr
Explanation:
Explanation:
If the speed downstream is a kmph and the speedup stream is b kmph then
Speed of the stream = 1/2 x (a–b) kmph
Speed downstream a = 12kmph
Speed upstream b = 8 kmph
Speed of the stream = 1/2 x (a–b) = 1/2 x (12–8)= 4/2 = 2 kmph