Find the simple interest, when: (i) Principal= Rs 4500, Rate of Interest= 4% per annum and Time =6 months. (ii) Principal= Rs 12000, Rate of Interest= 18% per annum and Time =4 months. (iii) Principal= Rs 1000, Rate of Interest= 10% per annum and Time =73 days.

Explanation

Simple interest =`(P xx R xx T)/100`

where P is the principal amount , R is the rate and T is time.

1. P=4500,R=4,T=0.5

applying in formula, simple interest=Rs.90

2.1. P=12000,R=18,T=`1/3`

applying in formula, simple interest=Rs.720

3.1. P=1000,R=10,T=0.2

applying in formula, simple interest=Rs.20