Question
A car covered a journey in 10 hours with an average
speed of 80km/hr. If it covers initial 30% of distance in 6 hours. Find the speed of car while covering remaining distance.ÂSolution
Total distance covered by car = 10×80 = 800 km. Initial 30% distance covered in 6 hours. So, the remaining distance covered in 4hrs. Let speed while covering remaining distance be v; v × 4 = 70% of 800 => v = 140 km/hr
A swimmer swims from a point A against a current for 5 minutes and then swims current for next 5 minutes and comes to the point B. If AB is 100meters, t...
Speed of a boat in still water is 3 times more than the speed of stream. If boat covers 135 km in downstream in 9 hours, then find the time taken by the...
A boat running downstream covers a distance of 42 km in 6 hrs and covering the same distance upstream in 14 hrs. What is the speed of a boat in still wa...
The speed of a boat in still water is 7 km/hr and the speed of the stream is 2.5 km/hr. A man rows to a place at a distance of 42.75 km and comes back t...
Ratio of downstream and upstream speed of a boat is 5:2. If the speed of stream is 3 km/h, find the distance travelled by boat in downstream in 2 hours.
A boat covers 32 km upstream and 40km downstream in 8 hours while it covers 40km upstream and 32 km downstream in 8.5 hours. What is the velocity of cur...
A boat, whose speed in still water is 25% more than the speed of the current, covers 315 km downstream in _____ hours. The speed of the boat in still w...
A motorboat in still water travels at a speed of 36 km/hr. It goes 64 km upstream in 2 hours. The time taken by it to cover the same distance down the s...
A boat travels 200 km downstream in 10 hours. The difference between its downstream speed and upstream speed is 5 km/h. What is the ratio of the boat's ...
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...