Question

# The length of a rectangular field is three times its breadth. If the area of the field is 147 sq. metres, then what is the length of the field (in metres)?21

Solution

## The correct option is A 21Let the breadth of a rectangle be x m. Then, the length equals 3x m. Area of a rectangle equals the product of length and breadth. ⇒147 m2=x×3x=3x2 ⇒x2=49 m2 x=±7 m Since breadth cannot be negative, we have x=7. Length of the field is thrice its breadth. Hence, length is 21 m.

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