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 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?
Answer: Option A
Answer: (a)Distance covered by car in2hours=${300 × 40}/100$ = 120kmRemaining distance= 300 - 120 = 180 kmRemaining time= 4 - 2= 2 hoursRequired speed=$180/2$= 90kmphOriginal speed of car=$120/2$= 60kmphRequired increase in speed= 90 - 60 = 30 kmph
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Answer: (a)Distance covered by car in2hours=${300 × 40}/100$ = 120kmRemaining distance= 300 - 120 = 180 kmRemaining time= 4 - 2= 2 hoursRequired speed=$180/2$= 90kmphOriginal speed of car=$120/2$= 60kmphRequired increase in speed= 90 - 60 = 30 kmph
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