the measure of two adjacent sides of a rectangle are in the ratio of 11 :10 .if the perimeter of the rectangle is 84 cm ,find its area।
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Answer:
440 cm²
Step-by-step explanation:
Let the ratio be 11x:10x.
Perimeter of rectangle = 2(l+b)
Given Perimeter = 84 cm
=> 2(11x+10x) = 84
=> 21x = 84/2
=> 21x = 42
=> x = 2
Hence, the dimensions of rectangle are 22 cm and 20 cm.
Area = l×b = (22×20) cm² = 440 cm²
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