Question

A barn with a flat roof is rectangular in shape, 10 metres
wide, 13 metres long and 5 metres high. It is to be painted inside and outside, and on the ceiling, but not
on the roof or floor. Find the total area to be painted.​

Answer 1

Total area to be painted=$360m^2$

Step-by-step explanation:

Length of barn=13 m

Width of barn=10 m

Height of barn=5 m

Surface area of cuboid except floor=$lb+2(l+b)h$

Where l=length of cuboid

b=Breadth of cuboid

h=Height of cuboid

By using the formula

Then, we get

Total area to be painted=$10\times 13+2(10+13)(5)$

Total area to be painted=$360 m^2$

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Answer 2

Step-by-step explanation:

The answer is 360

explanation in above answer