1.

Riya has a field with a flowerbed and grass land. The grass land is in the shape of rectangle while flowerbed is in the shape of square. The length of the grassland is found to be 3 m more than twice the length of the flowerbed. Total area of the whole land is 1260 m^(2). What is the value of x if the area of total field is 1260 m^(2).

Answer»

21 m
10 m
20 m
15 m

Solution :We have
`A=(3x+3)x`
`1260 =3x^(2) +3x`
`420=x^(2) +x`
`x^(2) +x -420=0`
`(x+21) (x-20) =0`
THUS, x = 20 is only POSSIBLE value.
Thus (c) is CORRECT option.


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