Question

a room is 5 m long 44 m wide and 2.5 m high fins the cost of white washing ita four walls at the rate of ₹ 3.80 per sq m​

Answer 1

Given :

• Length of room = 5 m
• Breadth of room = 4.4 m
• Height of room = 2.5 m

______________________________

To Find :

• Cost of white washing ita four walls at the rate of ₹ 3.80 per m²

______________________________

Solution :

★ C.S.A of room = 2h ( L + B )

→ C.S.A = 2 × 2.5 ( 5 + 4.4 )

→ C.S.A = 5 × 9.4

→ C.S.A = 47 m²

⇒ Cost of 1 m² white washing = ₹ 3.80

⇒ Cost of 47 m² white washing = 3.80 × 47 = 178.6

∴ Cost of white washing ita four walls is ₹ 178.6