Question

The length of a hall is twice its breadth. If the length is 16m, find the area of the ceiling.

Answer 1

Given length of hall = 24 cm

width of hall = 18 m

height of hall = 4 m

area of four walls = 2[ lb+bh]

area of four walls = 2[l+b]h

area of floor and flat roof = 2lb

Given 2[l+b]h=2lb

2[24+18]h=2×24×18

21 42h=24×18

h= 7/72

height of wall is

7/72 m

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Answer 2

Solution :-

Length = 16m

Length is twice it's breath ,

Therefore,

Breath = 16/2 = 8m

Area of rectangle = Length * Breath

Put the required values in the formula,

Area of ceiling = Length * Breath

Area of ceiling = 16 * 8

Area of ceiling = 128m^2

• In mathematics , Area is the quantity that express the extent of a two dimensional figure etc.