Question

the simple intrest on a certain sum of money for 3 years at 5% p.a. is rupees 1200. find 1)the principal 2)the amount at the end of second year at the same time 3)the compound intrest for 2 years​

Answer 1

Answer:

Principal is Rs. 80 , C.I. = Rs. 12.56

Step-by-step explanation:

S.I.= Rs.1200

P = ?

R = 5%

T = 3 yrs

Formula used, SI= (P×R×T)/100

Putting the values in the above formula,

1200 = (P×5×3)/100

On Solving, P= Rs.80

Now calculating C.I. for 2yrs,

Formula used C.I. = [P× {1+(R/100)}^T] - P

so, C.I. = 80 × {1+(5/100)}^3 -80

= 80 × (1.15) - 80

= 92.56 - 80

C.I. = Rs. 12.56