In what time will the interest on any sum of money at $10$ percent be $\frac{1}{4}$ of the sum?

5

years

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2 \frac{1}{2}

years

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4

years

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2

years

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Solution

The correct option is B $2 \frac{1}{2}$ years
Simple interest $= P R T$
where P is principal amount, R is interest rate & T is time in year.
Given $R = 10$
=> $0.25 P = P \times 0.1 \times T$
=> $T = 2.5$ years

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In what time will the interest on any sum of money at 10 percent be 14 of the sum?

The correct option is B 212 yearsSimple interest=PRTwhere P is principal amount, R is interest rate & T is time in year.GivenR=10=> 0.25P=P×0.1×T=> T=2.5years

In what time will the interest on any sum of money at $10$ percent be $\frac{1}{4}$ of the sum?

The correct option is B $2 \frac{1}{2}$ years
Simple interest $= P R T$
where P is principal amount, R is interest rate & T is time in year.
Given $R = 10$
=> $0.25 P = P \times 0.1 \times T$
=> $T = 2.5$ years