Question

on increasing each side of a a square by 25%, the increase in area will be
1)25%
2)55%
3)40.5%
4)56.25%
pls explain ur answer

Answer 1

Let the earlier side of square be x cm.
New side =x+25/100*x=x+1/4x=5x/4
Increase in area=(5x/4)²-x²
=25x²/16-x²
=9x²/16
=0.5625x²
Increase in %=0.5625x²/x²*100=56.25.
Hence, 4) 56.25 % is the correct answer.

Answer 2

Answer:

4) 56.25% is the correct answer.