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1)

A wire 34 cm long is to be bent in the form of a quadrilateral of which each angle is 90°. What is the maximum area which can be enclosed inside the quadrilateral?


A) 68cm2

B) 70cm2

C) 71.25cm2

D) 72.25cm2

Answer:

Option D

Explanation:

Let one side of quadrilateral be x and another side be Y so, 2(x + Y) = 34 or,

(x+y) = 17   .....(i)

We know from the basic principle that for a given perimeter square has the maximum area, so, x = y and putting this value in equation (i)

x = y = 17/2=8.5

Area = x.y = 8.5× 8.5 = 72.25cm2