Math, asked by actionbabu13, 4 months ago

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the
cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m
m.​

Answers

Answered by yazh97
0

Answer:

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Step-by-step explanation:

Length, breadth and height of a room are 5 m, 4 m and 3 m.

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

=2×3(5+4)

=6(9)

=54 sq m

Area of the ceiling =l×b

=5×4

=20 sq cm.

Total area of the four walls and the ceiling of the room

=54+20

=74 sq cm

Cost of white washing = Rs 7.50 per sq m

Total cost of white washing =74×7.50= Rs 555

Answered by malavikashaji23
0

Step-by-step explanation:

Total Surface Area to be white washed

=LTA+ Area of the base

=2(l+b)h+lb=2(5+4)×3+5×4m²

=74m²

Cost of white washing =Rs.(74×7.50)=Rs.555

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