Question

9. By what per cent will the area of a square change
if its side is increased by 10%?
(a) 10% increase (b) 20% increase
(c) 10% decrease (d) 21% increase​

Answer 1

Answer:

(b) increase because it change there value.

Answer 2

Answer: 21% Step-by-step explanation: Let the side of the square be 'a'  side increased by 10% = a+ 10/100a = a= 1.1a =  (1.1)^2a^2 = 1.21a^2 Increase in area = (1.21 - 1)/A x 100 =21%