Q. Walking at the rate of 4 km an hour, a man covers a certain distance in 3 hours 45 minutes. If he covers the same distance on cycle, cycling at the rate of 16·5 km/hour, the time taken by him is ?
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Q. A sum of money at simple interest doubles in 7 years. It will become four times in:
Q. If two times A is equal to three times of B and also equal to four times of C, then A : B : C is
Q. The compound interest on Rs. 30,000 at 7% per annum is Rs. 4347. The period (in years) is:
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