Question
A sum of Rs. 800 becomes Rs. 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4%, what amount will the same sum become in 3 years ?
Answer: Option D
Answer: (d)Using Rule 1,S.I. = 956 - 800 = Rs. 156Rate = ${\text"S.I." × 100}/\text" Principal × Time"$= ${156 × 100}/{800 × 3}$ = 6.5%New rate = (6.5 + 4)% = 10.5%S.I. = ${\text"Principal × Time × Rate"/100$= ${800 × 3 × 10.5}/100$ = Rs. 252Amount = Rs.(800 + 252) = Rs.1052
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Answer: (d)Using Rule 1,S.I. = 956 - 800 = Rs. 156Rate = ${\text"S.I." × 100}/\text" Principal × Time"$= ${156 × 100}/{800 × 3}$ = 6.5%New rate = (6.5 + 4)% = 10.5%S.I. = ${\text"Principal × Time × Rate"/100$= ${800 × 3 × 10.5}/100$ = Rs. 252Amount = Rs.(800 + 252) = Rs.1052
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