8sec²-8tan² is equal to A=1,B=0,C=9,D=8
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Topic - Simple and Compound Interest
Class - 8
1. ₹30,000 is invested for some period at 8% p.a. to earn ₹2400 as the simple interest. If the same sum is invested for the same period at the same rate of interest compounded half-yearly, find the compound interest.
Answer = ₹2448
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2. A sum of money is invested for 2 years at the rate of 12% per annum compounded annually. If it was invested at simple interest, the interest would be 72 less than the compound interest. Find the sum of money.
Answer = ₹5000
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