Question

5. A sum of money becomes double in 10 years at a certain rate of interest. Find the rate of interest
If the donation earns an interest of 10% per annum, find the value of each scholarship
EXERCISE 9.5
Amount (A)
Interest (1)
Time (t)
2 years
4 years
2
1. Calculate the interest and the amount in each of the following cases
3. Find the rate of interest in each of the following cases.
6. In how much time will a sum become double at 12% p.a. simple interest?
7. In how many years will 7500 amount to 19000 at 4% p.a. simple interest?
8. The simple interest on a certain sum for 1 year at 12% per annum is 4800. Find the sum.
9. Chetan opened a Savings bank account on 5th April, 2009 with a deposit of 1,00,400. He closed it after
2 years. If the bank paid him 6% interest per annum, what amount did he receive?
10. Saurabh lent 50,000 to his friend. He gave 30,000 at 12% and the remaining amount at 15% How
11. Mrs. Asha donated 75,000 to a Children Welfare Trust with the condition that the interest on this sum
is to be used for awarding five scholarships of equal value every year to the physically bandicappe
S. No. Principal (P) Rate (0)
2700
10,000
%
2575
6.5%
2. Find the principal in each of the following cases.
Time
S. No.
SI
2450
5 years
10 years
8000
2304
4 years
36 93
2
10%
8 months
8
12
years)
73
year
365
3 years
73 days
Principal
Rate
6% pa
16% pa
12% pa
Rate()
Time (C)
3 years
2 years
4 years
S. No.
Interest (
3810
280
Principal (P)
34500
(6)
356,000
1600
35,000
4. Find the time period for each of the following.
(a) P=19540,1= 1908, r=
(c) P=640, 1 = 40, r = 12 % p.a.
2
(b) P=6600, 1 = 7600, r=4% p.a.
8% p.a.
[Hint: Let P = x, then A=2x, 1 = x]
much interest did he receive in 4 years?
trest per annum from a money lender. At the end of 2 year
d the cost of the cow.
of 10% per annum for​

Answer 1

i don't know sorry bro