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प्रश्न
The length of a rectangular field is three times its breadth. If the area of the field be 147 sq meters, find the length of the field.
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उत्तर
Let the length and breadth of the rectangle be 3x m and x m, respectively. According to the question:
`3x xx x =147`
⇒`3x^2=147`
⇒`x^2=49`
⇒ `x=7 or x=-7`
⇒`x=7` ( ∵ x cannot be negative)
∴ Length = `3xx7=21m`
Breath=`7m`
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