Question
Suresh earned an interest of Rs. 1548 on principal
amount of Rs. 4800 at some rate of compound interest in 2 years. How much more/less interest would he have earned on Rs. 5400 at the same rate of simple interest for the same duration?Solution
Let, rate of interest be ‘r’% per annum So, 1548 = 4800 × {(1 + r/100)2 – 1} 129/400 = {(1 + r/100)2 – 1} 529/400 = (1 + r/100)2 (23/20)2 = (1 + r/100)2 23/20 = 1 + r/100 3/20 = r/100, r = 15 So, simple interest earned = 5400 × 0.15 × 2 = Rs. 1620 Required amount = 1620 – 1548= Rs. 72
More Simple and compound interest Questions
- What will come in the place of question mark (?) in the given expression?
40% of (320 ÷ 4) + 2² X 25 = ? + 42 1240 ÷ ? = 242 + 123 – 514 × 4
1428 ÷ 17 = ? % of 120
18(1/3) + 9(2/3) – 10(1/3) = 1(2/3) + ?
√ 225 x 24 - √ 144 x 18 = ?
Find the value of 40 ÷ 5 of 6 × [3 ÷ 6 × (12 – 6)] – (15 ÷ 3 of 30):
44% of 1900 + 25% of ? = 9000
- What will come in the place of question mark (?) in the given expression?
(24²–45% of 600 + 176 – 32 × 11) = ? 65% of 102 + 14 = ? – 20
(64/25)? × (125/512)?-1 = 5/8
Relevant for Exams:
