A car finishes a journey in five hours at the speed of 100 km/hr. If the same distance is to be covered in two hours how much more speed does the car have to gain?\nOptions:\n(A) 8 km/hr\n(B) 10 km/hr\n(C) 150 km/hr\n(D) 16 km/hr\n(E) None of these Let's think first. Stream of consciousness:
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Distance covered by the car = 100 × 5 = 500 km\n\ Speed = 500⁄2 = 250 km/hr\n\ Speed gain = 250 – 100 = 150 km/hr
So, the answer is (C).
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