# NCERT Class 8 Mathematics Solutions: Chapter 8 – Comparing Quantities Exercise 8.3 Part 5 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 9**: Find the amount which Ram will get on ₹ 4,096, if he gave it for 18 months at per annum, interest being compounded half yearly.

**Answer**:

Here, Principal (P) = ₹ 4096.

Rate of Interest (R) = (compounded half yearly)

Time (n) = 18 months = years = 3 half-years (compounded half yearly)

Amount (A)

**Question 10**: The population of a place increased to 54,000 in 2003 at a rate of 5 % per annum.

(i) Find the population in 2001.

(ii) What would be its population in 2005?

**Answer**:

(i) Find the population in 2001.

Here,

Population would be less in 2001 than 2003 in two years.

Here, population is increasing.

**(ii)** According to question, population is increasing. Therefore population in 2005,