Question
Raju invested a certain sum at
25% p.a. compound interest, compounded annually, and earned an interest of Rs. 2925 in 2 years. What will be the interest when the same amount is invested at 20% p.a. simple interest for three years?Solution
ATQ,
Compound Interest Formula: A = P × (1 + R/100)^T Given: Interest earned = Rs. 2925 Rate = 25% p.a. Time = 2 years A = P × 1.5625 Interest earned = A - P = 2925, P × 0.5625 = 2925 P = 2925 / 0.5625 P = 5200 Simple Interest Formula: SI = (P × R × T) / 100 Given: Principal = Rs. 5200 Rate = 20% p.a. Time = 3 years SI = (5200 × 20 × 3) / 100 SI = 3120 Hence, The interest earned with 20% p.a. simple interest for 3 years is Rs. 3120.
Simplify the following expressions and choose the correct option.
512 ÷ 2⁴ + 3³ × (5² − 4²) = ?
- Determine the value of ‘p’ if p% of 600 + {1440 ÷ p of 16} × 8 = 156
22.5% of 300 + 32.5% of 4500 =?
√1444 + √729 – √2116 = ?
Simplify: (1 ÷ 0.08)
3.3 Times 2/27 of 40% of 364=?
Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence?
What will come in the place of question mark (?) in the given expression?
(240% of 175 ÷ √16) X 6 + 80% of 400 = ?3 + 179 + 42
Find the value of x.
√441 ÷ 21+ √400 = 1 × x
What is the value of (6 + 4) ×12/4 + 5 – 3?
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