Question

12. Find the cost of painting the four walls of a room
10 metres long, 5 metres broad and 6 metres high
at the cost of 4 per square metre.

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Answer 1

Answer:

Area of 4 walls = 2h ×(l +b)

= 2 × 6 ( 10+5)

= 12 x 15

= 180 m sq.

Now,

Cost of painting = 180 × 4

= 720

Answer 2

Step-by-step explanation:

we have to calculate the 4 walls of a room and then it's cost.

hope it's help you