Question

If a side of square is increased by 5 cm and its area is also increased by 165cm than find the new length of the side of the square.

Answer 1

let the side of a square is x cm
then the area of a square is x^2 cm^2

if the side of a square is increased by 5 centimetre then the new side =x+5 cm
and the area of square = x^2+25+10x
now
x^2+25+10x-x^2=165
x=14
new length =19 cm