Find the principal if it’s interest in 3 months with 5 1/2% per annum is Rs 66
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Answer:
Correct Option: A
Here , P1 = ₹ 6000 , P2 = ₹ 1500 , T1 = 2 years , T2 = 4 years and SI = ₹ 900
If rate of interest be R% per annum then,
SI =
Principal × Time × Rate
100
∴ 900 =
6000 × 2 × R
+
1500 × 4 × R
100 100
⇒ 120R + 60R = 900
⇒ 180R = 900
⇒ R = 900 ÷ 180 = 5%
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