A boat is rowed down a river at 21 km/hr and up the
river at 9 km/hr. What is the speed of river ?
(A) 4 km/hr
(C) 6 km/hr
(B) 5 km/hr
(D) 6.5 km/hr
Answers
Answered by
10
6 km/hr
Attachments:
Similar questions