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# Simple Interest

1.

A man got Rs. 130 less, as simple interest, when he invested Rs. 2000 for 4 years as compared to investing Rs. 2250 for same duration. What is the rate of interest?

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2.

Rs.2500 is divided into two parts such that if one part be put out at 5% simple interest and the other at 6%, the yearly annual income may be Rs.140. How much was lent at 5%?

(x*5*1)/100 + [(2500 - x)*6*1]/100 = 140

X = 1000

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3.

Ram gets Rs. 2600 for Rs. 2000 in 5 years at some rate of simple interest. Had he invested in other places where rate of simple interest is 3% more than current rate, how much would have Ram got in same time?

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4.

What is the present worth of Rs. 132 due in 2 years at 5% simple interest per annum?

Let the present worth be Rs. x. Then,

S.I. = (132 - x)

(x * 5 * 2) / 100 = (132 - x)

10x = 13200 - 100x

110x = 13200 => x = 120.

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5.

Guddi invested some money in a bank at rate of 6% per annum. At simple interest, after 9 years, she got Rs. 8470. How much did she invest?

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6.

A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interest. The rate per annum is?

Let sum = x. Then, amount = 7x/6

S.I. = 7x/6 - x = x/6; Time = 3 years.

Rate = (100 * x) / (x * 6 * 3) = 5 5/9 %.

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7.

A sum fetched a total simple interest of Rs. 4016.25 at the rate of 9% p.a. in 5 years. What is the sum?

Principal = (100 * 4016.25) / (9 * 5) = Rs. 8925.

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8.

What sum of money will produce Rs.70 as simple interest in 4 years at 3 1/2 percent?

70 = (P*4*7/2)/100

P = 500

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9.

4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?

(x*3*1)/100 + [(4000 - x)*5*1]/100 = 144

3x/100 + 200 – 5x/100 = 144

2x/100 = 56

x = 2800

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10.

At what rate percent on simple interest will Rs.750 amount to Rs.900 in 5 years?

150 = (750*5*R)/100

R = 4%

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