A car finishes a journey in ten hours at the speed of 60 km/hr. If the same distance is to be covered in eight hours how much more speed does the car have to gain?\nOptions:\n(A) 8 km/hr\n(B) 10 km/hr\n(C) 12 km/hr\n(D) 16 km/hr\n(E) None of these OK. Let's think. Some random thoughts first:
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Distance covered by the car = 64 × 10 = 640 km\n\ Speed = 640⁄8 = 80 km/hr\n\ Speed gain = 80– 64 = 16 km/hr The answer: (D).
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