Simple Interest

  1. Question: At the rate of 6% p.a.simple interest ,a sum of Rs.`2500` will earn how much interest by the end of `5` years ?

    A
    `Rs 150`

    B
    `Rs 700`

    C
    `Rs 750`

    D
    `Rs 3250`

    Note: s.I = Rs `(2500 xx 6 xx 5/100)` `= Rs 750`
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  2. Question: A person borrowed Rs `500` at the rate of `5%` per annum S.I. What amount will he pay to clear the debt after `4` years ?

    A
    `Rs 200`

    B
    `Rs 550`

    C
    `Rs 600`

    D
    `Rs 700`

    Note: Amount = Rs `(500 + (500 xx 5 xx 4)/100)` `= Rs. 600`
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  3. Question: If A lends Rs.`3500` to B at `10%` p.a. and B lends the same sum to C at `11.5%`p.a, then the gain of B (in Rs) in a period of `3` years is :

    A
    `107.50`

    B
    `115.50`

    C
    `157.50`

    D
    `177.50`

    Note: Gain = Rs. `((3500 xx 11.5 xx 3)/(100) - (3500 xx 10 xx 3)/(100))` `= Rs.(1207.5 - 1050)` `= Rs. 157.50`
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  4. Question: In what time wil Rs. `500` give Rs. `50` as interest at the rate of `5%` p.a. S.I ?

    A
    `2 years`

    B
    `2 1/2 years`

    C
    `3 years`

    D
    `4 years`

    Note: Time `= ((100 xx 50)/(500 xx 5)) years` `= 2 years`.
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  5. Question: Avinash borrowed Rs `5000 from Sanjay at simple interest .After `3` years Sanjay got Rs .`300` more than he had given to Avinash. What was the rate of interest per annum ?

    A
    `2%`

    B
    `5%`

    C
    `8%`

    D
    `10%`

    Note: Rate `= ((100 xx 300)/(5000 xx 3))%` `= 2%`
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  6. Question: Ashok took a loan of Rs. `1500` for `3` years at simple interest. If the total interest paid is R. 2700,what is the rate of interest per annum ?

    A
    `5.4%`

    B
    `6%`

    C
    `9%`

    D
    `18%`

    Note: Rate `= ((100 xx 2700)/(1500 xx 3))%` `= 6%`
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  7. Question: Rakesh took a loan for `6` years at the rate of `5%`p.a.S.I.If the total interest paid was Rs.`1230`,the principal was :

    A
    `Rs. 4100`

    B
    `Rs. 4920`

    C
    `Rs. 5000`

    D
    `Rs.5300`

    Note: Principal = Rs. `((1230 xx 100)/(6 xx 5))` `= Rs 4100`.
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  8. Question: How much should a person lend at simple rate of interest of `15%`in order to have Rs.`784` at the end of `1 1/2` years ?

    A
    `Rs. 640`

    B
    `Rs. 620`

    C
    `Rs. 610`

    D
    `Rs. 680`

    Note: Let the required money be x.Then `(x + (x xx 15)/100 xx 3/2)` `= 784 ⇔ (49x)/40` `= 784 ⇔ x` `= (784 xx 40)/49` `= 640`.
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  9. Question: Satish took a loan at `10%`p.a. S.I. After `4` years ,he returned the principal along with the interest. If he returns in all Rs. `3500`, what is the principal amount ?

    A
    `Rs. 3250`

    B
    `Rs. 2500`

    C
    `Rs. 3150`

    D
    `Rs.2100`

    Note: Let the principal be Rs.x.Then, `x + (x xx 10 xx 4)/100` `= 3500 ⇔ (140x)/100` `= 3500 ⇔ x ` `= (3500 xx 100)/140` `= 2500`
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  10. Question: Rs. `800`amounts to Rs. `920`in `3` years at simple interest.If the interest rate is increased by `3%`,it would amount to how much ?

    A
    `Rs. 992`

    B
    `Rs. 1056`

    C
    `Rs. 1112`

    D
    `Rs. 1182`

    Note: Principal = Rs. 800, S.I `= Rs. 120, Time = 3 years` `Rate = ((100 xx 120)/(800 xx 3))%` `= 5%`. New rate` = 8%`, principal `= Rs. 800, Time = 3 years`. `S.I = Rs. ((800 xx 8 xx 3)/(100))` `= Rs. 192` :. New amount `= Rs. (800 + 192)` `= Rs. 992`
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