Question

A classroom is 6.8 m long
3.5m long wide 270 cm high find the cost plastering the 4wall ceiling at rate 12 per m

Answer 1

Given :-

Dimensions of the classroom :-

• Length (long) = 6.8m

• Breadth (wide) = 3.5m

• Height = 270cm = 2.7m

Thus it's clear that it's a cuboid.

Now we've to find the curved surface area of the wall + the ceiling to find the total cost.

CSA of a cuboid = 2h(l + b)

Area of the ceiling = l × b (since it's rectangular)

Total area needed to be plastered = 2h(l + b) + lb

= 2 × 2.7 (6.8 + 3.5) + (6.8 × 3.5)

= (5.4 × 10.3) + 23.8

= 55.62 + 23.8

= 79.42m²

Total cost @ rupees 12 m² = 12 × 79.42

= Rupees 953.04

Hence, the total cost of plastering the four walls and the ceiling is Rs 953.04

Answer 2

Answer:

ans is 953.04 please mark me as brainlist everyone ans is given below please support me i am very poor i want to became teacher in brainlist please support me ans given below thank you guys