New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Percentage and Its Applications Self Practice 8H Solution
Find the missing value.
(1) I if P = Rs. 800, R = 5% p.a., T = 2 years.
(2) I if P = Rs. 5000, R = 6.5% p.a. T = 3 years.
(3) R is I = Rs. 364 P = Rs. 1300, T = 7 years.
(4) P if I = Rs. 440, R = 5%, T = 4 years
Solution:
(5) T if I = Rs. 455, R = 7%, P = Rs. 1300
(6) After 2 years, the credit balance in a saving account earning simple interest was Rs. 585.75. The original amount was Rs. 550. What was the interest rate?
Solution:
(7) In what time will Rs. 1860 amount to Rs. 2641.20 at simple interest of 12% per annum.
(8) Find the simple interest on Rs. 7300 from 10 May 2017 to 10 September 2017 at 5% per annum.
Solution:
(9) A sum of Rs. 400 amounts to Rs. 480 in 4 years. What will it amount ti, if the rate of interest is increased by 2%?
Solution:
(10) On a certain sum, the simple interest at the end of 6-1/4 years becomes 3/8 of the sum. Find the rate of interest.
(11) A sum doubles itself in 8 years at simple interest. Find the rate of interest per annum.
Solution:
(12) In how many years will the simple interest on a sum of money be equal to the principal at the rate of 16-2/3% per annum?
Solution: