If soundharya rows 49 km upstream and 77 km down steam taking 7 hours each, then the speed of the stream Choose the correct choice from the following choices:  A) 6 kmph  B) 5 kmph  C) 2 kmph  D) 3 kmph  E) 4 kmph

Rationale: speed upstream = 49 / 7 = 7 kmph speed down stream = 77 / 7 = 11 kmph speed of stream = ½ ( 11 - 7 ) = 2 kmph answer : c
Answer: C