Ratio of time taken by a sailor to cover some distance upstream and downstream is 4 : 1. If speed of stream is 4.5 km/hr. Then find out speed of boat?
(A) 8.5 km / hr
(B) 9.5 km / hr
(C) 7.5 km / hr
(D) 8 km / hr
If a sailer sails 12 km distance within 5 hours against the flow of a river. If he sails 22 km distance in same time along the flow of the river. Then velocity of the river is _______
(A) 1 km / hour
(B) 2 km / hour
(C) 1.5 km / hour
(D) 2.5 km / hour
A man can row at a speed of
(A) 2
(B) 2.5
(C) 1
(D) 1.5
A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively, the distance of the destination from the starting place is :
(A) 21 km
(B) 25 km
(C) 16 km
(D) 18 km
The distance between AB is 174 km. Two Boats Start moving towards each other at the same time at points A and B respectively. One in upstream and other in downstream. If their speed in still water is 9.6 km/ hr. and 19.4 km/ hr. respectively. Then in how much time they will meet.
(A) 4.5 hr.
(B) 6 hr.
(C) 9 hr.
(D) 7 hr.
Get the Examsbook Prep App Today