Level
1

Solve the above problem; (First convert into quadratic equation, then solve)

3 and 40
12 and 10
6 and 20
5 and 24

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P=2 L+2 W = 58...............eq. -1

A = L B = 120.....................eq. -2

Now L=120/W

& eq.1 became, 2(120/w) +2 W =58

so W =24 or 5 (ans.)