The cost of carpeting a square room at rate of rs. 120 per m^2 is rs. 17280. The cost of painting the wall of the room at rate of rs.51m^2 is rs 1920.find height of the room​

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

the answer is 99.