Apart of 1500rs was lent on 10% p. a and the rest at 7% p. a. simple interest. the total interest earned in 3 yrs was 396rs. what was the sum lent at 10% p. a?

  ₹900

Step-by-step explanation:

Let x represent the amount loaned at 10%. Then (1500-x) is the amount loaned at 7%, and the total interest for 3 years is ...

  i = Prt

  396 = x(0.10)(3) + (1500-x)(0.07)(3)

  396 = 0.09x +315 . . . . . simplify

  81 = 0.09x . . . . . . . . . . . subtract 315

  81/0.09 = x = 900 . . . . . divide by the coefficient of x

The sum lent at 10% was ₹900.

step-by-step explanation:

so first find out how much each is worth.

quarter= 25 cents

dime= 10 cents

pennies= 1 cent

then multiply each by how much each is worth.

200                     150                   300

x                         x                     x   1

  25                       10              

                                  300

1000                     1500

+                          

4000                                      

5000                                  

then count 2 from the back and add a period.

$50.00

$15.00

$3.00

and then add them

  $50.00

+

  $15.00

+

    $3.00

$68.00

so sunghee has $68.00

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expression #3 is not equivalent. the others are.