Question

28. The perimeter of a rectangular room is 300
m. If the breadth of the room is 70 m. Find
the area of the room.
(A) 5600
(C) 5100
TTT (6) 6500
(B) 6500
(D) 5680​

Answer 1

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$perimeter = 300 \: m$

$2(l + b) = 300$

$l + 70 = 150$

$l = 150 - 70$

$l = 80 \: m$

$area \: = l \times b$

$area = 80 \times 70$

$area = 5600 \: m {}^{2}$

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