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In how much time will the simple interest on a certain sum of money be \(\frac 6 5\) times of the sum at 20% per annum?1. 6 years2. 5 years3. 7 years4. 8 years |
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Answer» Correct Answer - Option 1 : 6 years Given: Interest = 6/5 times of principal Rate of interest = 20% Formula used: SI = (P × R × T)/100 where I = Interest, P = Principal, R = Rate and T = Time Explanation: Let principal = x then, Interest = x × 6/5 = 6x/5 6x/5 = (x × 20 × T)/100 ⇒ 6x/5 = (x × T)/5 ⇒ T = 6 years ∴ The time will be 6 years. |
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