Question

15. A machine is manufactured by assembling two parts A and B. If the price of part A increases by
10% and that of part B decreases by 10%, the cost of manufacturing the machine increases by 5%.
But if the price of part A decreases by 10% and that of part B increases by 10%, the cost decreases
by RS 200. Find the prices of the parts.

PLESE SOLVE STEP-BY-STEP CLEARLY......?​

Answer 1

Step-by-step explanation:

let price of part A be a, part B be b

a b

10% -10%

. .

. .

5%

. .

. .

5-(-10) 10 -5

15 5

a:b =15:5= 3:1

(3×(-10)+10) /4 =-20/4=-5%

5% is 200

100% is 4000

4 parts is 4000 => 1part is 1000

a is 3parts =3000

b is 1 part = 1000