Question

If the side of a square is 10%. If it is increased by what percent then its area will increase by​

Answer 1

Step-by-step explanation:

let side of square = 10 cm

then it's area = 100cm²

no

it's increased by 10%

so new side = 11cm

area = 121 cm²

increased area = 21%

Answer 2

Answer:

Area of increase is equal is 21% .

Step-by-step explanation:

Side = a

10% increase = a+ a*(10/100) = a+ a/10 = 11a/10.

Previous area = a²

New area = (11a/10)² = 121 a²/100 .

Increase = 121a²/100 - a² = 21a²/100

Percentage of increase = $\frac{\frac{21a^{2} }{100} }{a^{2} }$ * 100 %

= 21% .