chapter 8 page number 131 class 8 try these

A = P(1 + R/100)^n
P = 2400
R = 5%
n = 2
A = 2400(1 + 5/100)^2
= 2400 (100/100 + 5/100)^2
= 2400 x 105/100 x 105/100
Amount = 2646 Rs.

A = P(1 + R/100)^n
P = 1800
R = 8%
n = 1
A = 1800(1 + 8/100)^1
= 1800( 100/100 + 8/100)^1
= 1800 x 108/100
Amount = 1944 Rs.