Kinematics Question 164
Question: A man swimming downstream overcome a float at a point M After travelling distance D he turned back and passed the float at a distance of D/2 from the point M, then the ratio of speed of swimmer with respect to still water to the speed of the river will be
Options:
A) 2
B) 3
C) 4
D) 2.5
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Time taken by man to go form M to P and then P to N = time taken by float to go form M to N. $ \frac{D}{v+u}+\frac{D}{2(v-u)}=\frac{D}{2u} $ Simplify to get $ \frac{v}{u}=3 $
