Question

Find the amount which Reena will get on Rs 81920, if she kept it for 18 months at
25/2% per annum interest being compounded semi-annually​

Answer 1

Answer:

Principal, P = Rs. 81920

Rate of interest, R = 25/2 %

Time, T = 9 months = 9/12 years = 3/4 years

We know that amount is equal to P[ 1 + (R/400)]^4T

Hence,

Amount = P [ 1 + ( R / 400 ) ] ^ 4T

=> Amount = 81920 [ 1 + { 25 / ( 2 * 400 ) } ] ^ [ 4 * ( 3 / 4 ) ]

=> Amount = 81920 [ 1 + ( 25 / 800 ) ] ³

=> Amount = 81920 [ 1 + ( 1 / 32 ) ]³

=> Amount = 81920 [ ( 32 + 1 ) / 32 ]³

=> Amount = 81920 [ 33 / 32 ]³

=> Amount = 81920 * ( 33 / 32 ) * ( 33 / 32 ) * ( 33 / 32 )

=> Amount = 2.5 * 33 * 33 * 33

=> Amount = 2.5 * 35937

=> Amount = Rs. 89842.50

Answer 2

these answer is corrrect