Question

Keerthi borrowed rupees 7,000 at simple interest. After 3 years, she paid 8,470 to the lender. Find the rate
of interest per annum.​

Answer 1

Answer:

40 1/3

Step-by-step explanation:

PTR/100=SI

7000*3*R/100=8470

by solving R= 40 1/3

Answer 2

Answer:

490

Step-by-step explanation:

Keerthi borrowed = 7000

she paid= 8470

interest = paid - borrowed

= 8470-7000

= 1470

rate of interest per annum = 1470/490

= 490

hence , rate of interest per annum is 490