Question

At what rate percent per annum will a sum of ₹ 3200 amount to ₹ 3528 in 2 years, compounded annually?​

Answer 1

Answer:

Step-by-step explanation:

I=3528-3200

I=328

I=P[1+R/100]²

328=3200[100+R/100]²

328=3200[10000+R²+200R/10000]

328=8[10000+R²+200R]/25

328×25=8[10000+R²+200R]

10000+R²+200R=328×25/8

10000+R²+200R=41×25

R²+200R=1025

R²+200R-1025=0

R²-5R+205R+1025=0

R(R-5)+205(R+5)

(R+205)(R-5)=0

R= -205 OR R=5

Rate can't be negative . so, R =5%