The length of a rectangular field is 100 m, and its perimeter is 300 m. Find the breadth of the rectangular field.

A: 50 m

B: 150 m

C: 300 m

D: 160 m

Correct Answer : A

Given: Perimeter = 300 m and length, l = 100 m.

To find: Breadth (b).

As we know, rectangle’s perimeter = 2 (l + b)

Substituting the given values, we derive the following:

2(l + b) = 300 m

Dividing both sides by 2, we get

l + b = 150 m

Substituting l = 100 m, we get

100 + b = 150 m

Simplifying the above equation, we get

b = 150 – 100 m

b = 50 m

Hence, the breadth of the rectangular field is 50 m

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