a wire 72 cm long its is bent to form a rectangle the ratio of its length to its breath is 7:5 find area of the rectangle
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Answer:
315 cm²
Step-by-step explanation:
Let the no. be 7x and 5x.
Length = 7x
Breadth = 5x
Perimeter of rectangle = 2 (L+B)
72 cm = 2 ( 7x + 5x )
72 / 2 = 12x
12x = 36
x = 36 / 12
x = 3
Length = 7x = 7 × 3 = 21 cm
Breadth = 5x = 5 × 3 = 15 cm
Area = L × B
= 15 × 21
= 315 cm²
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