Question

what will sum amount to rupees 10120 in 2 years at C.I.payable if the rates are 10% and 15% for the successive years​

Answer 1

Answer:

Rs.8000

Step-by-step explanation:

For 1st year :

Let , the principal = rs.100

the rate = 10%

the time = 1 year

Interest = P×R×T/100

100×10×1/100

So, Interest = 100 rs

Now , Amount = P+I

= 100+10

= 110 rs

For 2nd year :

principal = rs 110

rate = 15 %

time = 1 year

Interest = P×R×T / 100

= 110×15×1/100

So, Interest = 16.50 rs

Now, Amount = P+I

= 110+16.50

=126.50 rs

When Amount is Rs 126.50 and principal is Rs 100

Hence, Amount is Rs 10120 then

Principal = 10120×100/126.50

= Rs 8000

ANSWER : Rs 8000