Question

A certain sum of money at simple interest amount to 13000 in 4 years and to 15250 in 7 years find the sum and the rate per cent​

Answer 1

Answer:

P=1000

Step-by-step explanation:

Principal+interest for 4 years= 1300

Principal+interest for 7 years= 1525

subtract

then for 3 year=225

1 year= 75

4 year interest = 75 x 4= 300

subtract from 1st answer

1300-300= 1000

principal = 100

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