Question

41. Side of a square increased by 10%,find the increase in area.?

(a) 20%
(b) 21%
(c)10%
(d)30%​

Answer 1

Answer:

(b)

Step-by-step explanation:

let the side of the square be x

therefore area = x^2

new side= x+x*10/100= 11x/10

area= 121x^2/100

increase= 121x^2/100-x^2=21x^2/100

increase percent= 21x^2/100/(x^2)*100= 21%