Question

The area of four walls of a room is 144m2 if the length of the room is thrice its breadth and the height is 3m find the area of the floor

Answer 1

Answer:

$let.... \\ breadth \: = b \: m\\ length = l \: m= 3 \times b = 3b \: m \\ height = h \: m \: = 3 \: m$

$area \: of \: four \: walls = 144 \: sq.m \\ 2h(l + b) = 144 \\ 2(3)(3b + b) = 144 \\ 6(4b) = 144 \\ 4b = \frac{144}{6 } \\ 4b = 24 \\ b = 6 \: m$

$l = 3 \: b \\ l = 3(6) \\ l = 18 \: m$

$area \: of \: the \: floor \: = l \times b \\ = 18 \times 6 \\ = 108 \: sq.m$

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Answer 2

Answer:

108 sq.cm

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