Question

13. Amit borrowed Rs. 8000 at 5% interest per annum. At the end of 4 years, he
paid back Rs. 8500 and a watch. Find the cost of the watch,​

Answer 1

Answer:

Answer = Rs 1261

Step-by-step explanation:

Principal for the first year = Rs.8000, Rate = 5% per annum, T = 1 year

Interest for the first year = =100P×R×T=Rs.[1008000×5×1]=Rs.400

∴ Amount at the end of the first year = Rs. (8000 + 400) = Rs. 8400

Now principal for the second year = Rs.8400

 Interest for the second year = 100P×R×T=Rs.[1008400×5×1]=Rs.420

∴ Amount at the end of the second year = Rs. (8400 + 420) =Rs.8820

Interest for the third year = 100P×R×T=Rs.1008820×5×1=Rs.441

∴ Amount at the end of the third year = Rs.(8820 + 441) = Rs. 9261

Now we know that total C.I. = Amount - Principal = Rs. (9261 - 8000) = Rs. 1261 

we can also find the C.I. as follows

Total C.I. = Interest for the first year + Interest for the second year + Interest for third year = Rs. (400 + 420 + 441) = Rs.1261

Answer 2

Answer:

cost of watch=1224.05

hope you got answer