Question

a lend rs.2500 to b and certain sum to c at the same to c at the same time at 7% per annum simple interest.if after four years a altogether recives rs.1120 as interest from b and c find the sum lent to c

Answer 1

A lends money to B= 2500

A lends money to C =?

Rate of interest= 7%

time = 4 years

Total money of interest after 4 years B+C= 1120

ANSWER:

step 1: calculate the amount of A lending money to B

    PRT

-------------                         formula: (principle X rate of interest X time)/100

    100

so P= 25OO, R= 7 , T=4

        2500X7X4

---------------------------- = 700

               100

YOUR AMOUNT RECEIVED IS 700.

Step 2: deduct amount from B from the total of B and C.

1120-700 = 420

now use 420 as your amount to find value of missing.

Step 3: Find value of missing

                               PRT

AMOUNT = ----------------------

                                100

           (x) (7) (4)

420 = -----------------

                100

At the end your answer for value of x will be= 1500

That's your amount.

Answer is 1500