The length and breadth of a rectangle are (3x + 4)cm& (4x -- 13) cm. If the perimeter of the rectangle is 94cm, then x =
(a) 4
(b) 8
(c) 12
(d) 6
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Answer:
Perimeter = 2(length + breadth)
94 = 2(3x + 4) + 2(4x - 13)
94 = 6x + 8 + 8x - 26
94 = 14x - 18
94+18 = 14x
therefore
x = 94+18 / 14
x = 8
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