Question
Quantity I. A sum of money becomes tripple in 4 years at
compound interest, compounded annually. In how many years it will become 9 times? Quantity II. What must be the rate of interest if a given amount tripled itself in 20 years? Study the following information carefully and answer the Questions given below:Solution
Quantity II. Since the amount was Rs 100. It becomes Rs 300 in 20 years. Rs 300 β Rs 100 = Rs 200 interest In 20 years, interest is Rs 200 In 1 year, the interest is Rs 200/20 Rate of interest = 10% per annum Hence Quantity I < Quantity II
Evaluate:
β729 + β49 - β16 + 1/β64
Simplify:

(1/5)(40% of 800 β 120) = ? Γ 5
2/5 of 3/4 of 7/9 of 7200 = ?
`sqrt(5476)` + 40% of 1640 = ? `xx` 4 - 2020
? = (22% of 25% of 60% of 3000) + 21
Determine the simplified value of the given mathematical expression.
(342 β 20% of 5280) = ? Γ· 3
β157464 =?