of cementing its floor and wailis at lThe floor of a rectangular hall

1.	of cementing its floor and wailis at lThe floor of a rectangular hall has a perimeter 236 m. Its height is 4.5 m. Find the costof painting its four walls (doors and windows be ignored) at the rate of 8.40 persquare metrelonath of 30 cmt a breadth of 20 cm and a height of 20 cm.
Answer» Area of four walls = 2(l+b) * h = 236m * 4.5m = 1,062 m^2 Hence cost to do that at rate of ₹8.40 per square metre = ₹1062*8.40 = ₹8,920.8

of cementing its floor and wailis at lThe floor of a rectangular hall has a perimeter 236 m. Its height is 4.5 m. Find the costof painting its four walls (doors and windows be ignored) at the rate of 8.40 persquare metrelonath of 30 cmt a breadth of 20 cm and a height of 20 cm.

Answer»

Area of four walls = 2(l+b) * h

= 236m * 4.5m

= 1,062 m^2

Hence cost to do that at rate of ₹8.40 per square metre = ₹1062*8.40

= ₹8,920.8