Question

the length and breath of a rectangul are in the ratio 4:3 and the diagonal measure 10 cm then its perimeter is​

Answer 1

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Since ratio of Length : Breadth = 3:2, assume them to be 3a and 2a respectively.

Now, area => Length x Breadth => 3a x 2a = 38400 sq m. Given

Or 6(a²) = 38400

OR a² = 6400

OR a = 80.

Thus, the length and breadth are 3*80 = 240 and 2*80 = 160 m respectively.

And perimeter =2(Length+Breadth) = 2(240+160) = 800 m.