CPT math solution

The growth of population is usually geometric. Formula for this problem will be P=A(1+0.2)*t

Population (P) = A (55 crore) * (1+0.20) * 10 years = 66 crores.

Note: 2% p.a. becomes 0.2 and t=10 years above is calculated from 2005 to 2015 and A=55 crore population in 2005.

Let others comment.

For 1. u have to use the formula A=P(1+i)*n , where A=9625, i=0.1,n=5.

(1+i)*n=1.61051, thereforeP=9625/1.61051, which equals to 5976.37 which is the correct answer.

U can counter check it by finding compound interest=3648.633 and so C.I. and P add upto 9625 which is the amount..

So, the correct answer is 5976.37.

For2. u have to use, A=P(1+i)*n, where P=55,i=0.02,n=10(2015-2005)

(1+i)*n=1.21899 , P=55 , therefore A=1.21899 * 55 =67.044 i.e. 67 crores which is the correct answer.

@ ankit it cant be only 67 crore bcoz. 0.044crore itself represents a huge number of population so answer is none

for question number 1 u can use formula of compound amount