Question

The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are

4.5 m, 3 m, and 350 cm respectively. Find the cost of plastering at the rate of Rs 8 per m2

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Answer 1

Answer:

l= 4.5m

b= 3m

h= 350 cm=3.5 m

Area to be plaster= area of four walls+ area of base

= 2h(l+b)+lb

=2*3.5(4.5+3)+4.5*3

=7*7.5+13.5

=52.5+13.5=66 sq.m

Total cost= 66*8=528 rupees

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Cost of Plastering the walls and ceiling at the rate of 8Rs./m^2=(L.S.A of the cuboid+Area of the Ceiling)×8

=[{2(L+B)H}+{L×B}]×8

=[{2(4.5+3)×3.5}+(4.5×3)]8

=528