RS Aggarwal Class 7 Math Twelfth Chapter Simple Interest Exercise 12B Solution

RS Aggarwal Class 7 Math Twelfth Chapter Simple Interest Exercise 12B Solution

EXERCISE 12B

OBJECTIVE QUESTIONS

Mark (√) against the correct answer in each of the following:

(1) The simple interest on Rs 6250 at 4% per annum for 6 months is

Ans: (a)

(2) A sum amounts to Rs 3605 in 219 days at 5% per annum. The sum is

Ans: (b)

(3) At simple interest a sum becomes 6/5 of itself 2 ½ years. The rate of interest per annum is

Ans: (c)

(4) In what time will Rs 8000 amount to Rs 8360 at 6% per annum simple interest?

Ans: (b)

(5) At what rate per cent per annum simple interest will a sum double itself in 10 years?

Ans: (b)

(6) The simple interest at x% per annum for x years will be Rs x on a sum of

Ans: (c)

(7) The simple interest on a sum for 5 years is 2/5 of the sum. The rate per cent per annum is

Ans: (b)

(8) A borrows Rs 8000 at 12% per annum simple interest and B borrows Rs 9100 at 10% per annum simple interest. In how many years will their amounts be equal?

Ans: (c)

(9) A sum of Rs 600 amounts to Rs 720 in 4 years. What will it amount to if the rate of interest is increased by 2%?

Ans: (c)

(10) x, y and z are three sums of money such that y is the simple interest on x and z is the simple interest on y for the same time and same rate. Which of the following is correct?

Ans: (d)

(11) In how much time would the simple interest on a certain sum be 0.125 times the principal at 10% per annum?

Ans: (a)

(12) At which sum will the simple interest at the rate of 3 ¾ % per annum be Rs 210 in 2 1/3 years?

Ans: (b)