Question

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:
8.5 km/hr
9 km/hr
10 km/hr
12.5 km/hr

Answer 1

@mohammad.arqum

Answer 2

Given that answer is 10km/hr

Answer 3

It is 10km/hr because 12.5 is the speed of the man without the wind and against the wind it is 12.5-2.5 which is 10km/hr

Answer 4

@AllTehMaffs

Answer 5

subtract twice the speed of current to that of the speed of man with current

Answer 6

thanx....@praxer

Answer 7

Yah, with current
\[v+2.5km/h=15km/h\]
\[v=12.5km/h\]
then against
\[v-2.5km/h=10km/h\]