Question

A car covers its journey at the speed of 50 km/hr in 4 hours. If the same distance is to be covered in 2 hours, by how much the speed of car will have to increase?

A 24 km/hr Correct Answer Incorrect Answer
B 46 km/hr Correct Answer Incorrect Answer
C 30 km/hr Correct Answer Incorrect Answer
D 50 km/hr Correct Answer Incorrect Answer
E 64 km/hr Correct Answer Incorrect Answer

Solution

Initial speed = 50 km/hr Total distance = 50× 4 = 200 km New speed = 200/2 = 100 km/hr Increase in speed = 100 - 50 = 50 km/hr

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