A lent Rs. 5000 to B for 2 years and Rs. 3000 to C for 4 years on simple interest at the same rate of interest and received Rs. 2200 in all from both of them as interest. The rate of interest per annum is:
Explanation:
Let the rate be R% p.a.
Then, 5000×R×2100+3000×R×4100=2200
⇒ 100R + 120R = 2200
⇒ R = 2200/220 = 10.
∴ Rate = 10%.
Hence, option (d).
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