If ₹ 6000 earns C.I. = ₹ 1200 in 6 months; then the rate of interest per year is :
40%
15%
20%
24%
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On a certain sum, the S.I. for 2 years is ₹ 2400. If the rate of interest is 10% p.a., then :
C.I. for 1st year is :
₹ 1200
₹ 1320
₹ 1800
₹ 2640
C.I. for 2nd year is :
₹ 1980
₹ 2400