Sohan is driving back home to Siya after a weekend away. If he travels at an average speed of 60 kmph, the journey will take 40 minutes longer than if he travelled at an average spped of 15 kmph faster. How far apart have Sohan and Siya been this weekend?
If D is the distance then
{Time taken to travel 'D' distance at 60 Kmph} D/60 = {Time taken to travel 'D' distance at 75 Kmph} D/75 + (40/60) {The delay by traveling slower} D/60 = D/75 + (2/3) 5D/300 - 4D/300 = 2/3 D = 300*(2/3) D = 200 Km.
Kajal and Rajendra start running from the same place at the rate of 7.6 kmph and 7.85 kmph respectively. What time in hours will they take to be 13.5 km apart, if they run in the same direction?
A train leaves station A at 9:00 am for station B and travels at 80 km/ hr. At the same time another train leaves station B for station A and travels at 100 km/hr. How far (in km) will the trains be apart 45 minutes before they meet?
How many seconds will a 468 m long train take to cross a man driving his motor bike at a speed of 39 km/hr in a direction of the moving train if the speed of the train is 120 km/hr?
The velocity of a river is 2 km/hr. How much time is required to travel a boat in that river for 10 km. downstream them 10 km. upstream. Velocity of boat is 3 km/hr in still water.
A car can travels 450 km in 4 hours. If the speed is decreased by 15 1/2 kmph, how much time does the car take to cover a distance of 873 km?
