Question

6. The length of a rectangular field is twice its breadth. A girl jogged around it 4 times and covered a distance of 4.5 km. What is the length of the field?
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Answer 1

Around it = Perimeter

4P = 4.5km

P = 1.125km

Let the b be x

l = 2x

b = x

P = 2 (l + b)

= 2 (2x + x)

= 2 (3x)

= 6x

P = 1.125 = 6x

=

$\frac{1.125}{6}$

b = 0.1875km

l = 2 × 0.1875

= 0.375km