Question : A car can finish a certain journey in 10 hours at a speed of 42 km/hr. In order to cover the same distance in 7 hours, the speed of the car (km/hr) must be increased by:

Option 1: 12 km/hr

Option 2: 15 km/hr

Option 3: 18 km/hr

Option 4: 24 km/hr

Question : Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/hr, 50% of the distance at 25 km/hr and the remaining 10% distance at 10 km/hr. Find his average speed over the whole distance.

Option 1: 25 km/hr

Option 2: 28 km/hr

Option 3: 26 km/hr

Option 4: 30 km/hr

Question : A car driver leaves Bangalore at 8.30 A.M. and expects to reach a place 300 km from Bangalore at 12.30 P.M. At 10.30 A.M., he finds that he has covered only 40% of the distance. By how much, he has to increase the speed of the car in order to keep up his schedule?

Option 1: 45 km/hr

Option 2: 40 km/hr

Option 3: 35 km/hr

Option 4: 30 km/hr