Question

If the dimensions of a room are 10 m X 12 m X 9 m, then find the cost of painting its four walls at the rate of Rs. 10 per square metre

Answer 1

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Step-by-step explanation:

Dimensions of a room are 10 m X 12 m X 9 m

We know it is in the shape of cuboid.

Lateral Surface Area of cuboid=2(l+b)h

=2(10+12)9

=2(22)9

=44×9

=396m^2

=Cost of per square metre=₹10

=Cost of 396m^2=396×10

=cost of painting its four walls=₹3960

Answer 2

Answer:

Dimensions of a room are 10 m X 12 m X 9 m

We know it is in the shape of cuboid.

Lateral Surface Area of cuboid=2(l+b)h

=2(10+12)9

=2(22)9

=44×9

=396m^2

=Cost of per square metre=₹10

=Cost of 396m^2=396×10

=cost of painting its four walls=₹3960