Question

The length of rectangular field is twice its breadth. A man jogged around it 5 time and cover a distance of 3 km. What is the length of the field .​

Answer 1

Answer:

The answer is 0.2 km.

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Answer 2

Answer:

• In completing one round of the field distance covered is equal to the perimeter of the field.

• ∴ Distance covered in 5 rounds = 5 x Perimeter

$= 5 x 2 ( l + w ) \\ </h3><h3>= 10 x ( l + w) \\ </h3><h3>= 10 x ( 2w + w ) [ length = l = 2w ] \\ </h3><h3>= 10 x 3w \\ </h3><h3>= 30 w </h3><h3>$

• But, the total distance covered is given = 3 km = 3000 m.

∴

$30 x w = 3000 \\ </p><p>⇒ w = 3000 / 30 \\ </p><p>⇒ w = 100 m$

• ⇒ Length = 2 w = 2 x 100 = 200 m.

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