A barn with a flat roof is rectangular in shape of breadth 10 metre, length 15 metre and height 5 metre .it is to be painted inside on the wall and on the ceiling but not on floor.find the total area to be painted
Answers
If the barn with dimensions 15 m x 10 m x 5 m, is to be painted inside on the wall, and on the ceiling, but not on the floor, then the total area to be painted is 400 m².
Step-by-step explanation:
The dimensions of the barn with a flat roof of rectangular shape:
Length, l = 15 m
Breadth, b = 10 m
Height, h = 5 m
Since the rectangular barn is to be painted from inside on the wall and on the ceiling but not on the floor, therefore,
The required area of the barn to be painted is given by,
= [{Lateral Surface area of the rectangular cuboid}] + [Area of the ceiling]
= [2h(l+b)] + [l * b]
= [2 * 5 * (15 + 10)] + [15 * 10]
= [10 * 25] + [150]
= 250 + 150
= 400 m²
Thus, the total area to be painted is 400 m².
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COMMENT:
sorry but all the answers are wrong the answer should be any of the following
THE ANSWERS SHOULD BE
A)590m^2
B)630m^2
C)610m^2
D)670m^2
but the above answer is correct cause it is a different question