A hall measures 12 metres long, 10 metres wide and 4 metres high. What is the surface area of the walls? A 480 m2

Question

A hall measures 12 metres long,
10 metres wide and 4 metres high.
What is the surface area of the
walls?
A 480 m2
B 176 m2
C.88 m2
D. 416 m2​

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Diễm Kiều 5 years 2021-08-20T20:24:51+00:00 1 Answers 27 views 0

Answers ( )

  1. Sapo1
    0
    2021-08-20T20:26:15+00:00
    Reply

    \huge\sf\red{Answer : - }

    Given :-

    • Length of the hall = 12m
    • wide of the hall (Breadth) = 10m
    • Height of the hall = 4m

    To Find :-

    • Surface area of the walls (Four walls area)

    Formula :-

    Four walls area of the hall = 2h(l+b)

    where,

    • h = height
    • l = length
    • b = breadth

    Solution : –

    By substituting values according to the formula,

    ➙ 2 × 4m(12m + 10m)

    ➙ 8m(22m)

    ➠ 176m²

    It’s option B

    Hence, The surface area of the walls is (B) 176m²

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