Question

Find : () the rate of interest.
() the sum that will become 3 810 in 7 years at the same rate of interest.
13. A sum amounts to 3 2,652 in 6 years at 5% p.a. simple interest
Find : (i) the sum
(ii) the time in which the same sum will double itself at the same rate of interest.
14. P and Q invest 3 36,000 and 25,000 respectively at the same rate of interest per
year. If at the end of 4 years, P gets 3,080 more interest than Q. find the rate of
interest.
15. A sum of money is lent for 5 years at R% simple interest per annum. If the interest
earned be one-fourth of the money lent, find the value of R.
16. The simple interest earned on a certain sum in 5 years is 30% of the sum. Find the
rate of interest.
3900 lent out at 4% for 5 years ?
12. A sum of 1.780 becomes < 2,136 in 4 years.


solve it plzzzz​

Answer 1

(i)A=2652,T=6,R=5%

A=P(

100

100+TR

)

P=

100+TR

A×100

P=

100+6×5

2652×100

P=

130

2652×100

P=Rs.2040

(ii)P=Rs.2040,A=4080,R=5%

I=A−P

I=4080−2040

I=2040

T=

PR

I×100

T=

2040×5

2040×100

T=20 yrs