Question

the floor of a rectangular hall has a perimeter 15m.if the cost if painting the four wall at the rate of 10 rs per m²is 15000.fibd the height of the wall​

Answer 1

Answer:

Step-by-step explanation:

perimeter of base=15m

cost of painting Rs. 10 per m2= Rs.15000

2(l+b)= 15m

(l+b)=15/2

      = 7.5m

Area of 4 walls= 2lh+2bh

                        = 2h (l+b)

                        = 2hx7.5

                        = 15h

Therefore, area of 4 walls= 15h m2

Cost of painting 1 m2= Rs. 10

Cost of painting 15m2= Rs. 10x15h

Therefore height= 15000/150

                            =1500m