Question

the price of 10 chocolate is equal to that of five candies the price of 20 chocolates and 35 candies together is 2700 rupees the total price of 5 chocolate and 20candies is?

Answer 1

let x be price if chocolate

and Y be price of candies

According to question

CASE 1:

10X=5Y

or

10x-5y=0

2x-y=0--(eq-1)

Case 2:

20x+35y=2700

or, 4x+7y=540--(2)

now (eq-1×2)

we get

4x-2y=0--(eq-3)

now (eq-1)-(eq-3)

4x-2y=0

-

4x+7y=540

=-5y=-540

hence Y=540/5=108

then x=108/2=54-(from eq-1)

hence; we have x=54

y=108

so total of 5 chocolate s and 20candies would be 5(54)+20(108)=2430rs ANS: