The side of a square is increased by 25% then how much % does its area increases?
52.65
56.25
50.75
42.75
Explanation:
a = 100 $a^2$ = 10000
a = 125 $a^2$ = 15625
----------------10000 --------- 5625
100 -------? => 56.25 %
Next Question
The cross-section of a cannel is a trapezium in shape. If the cannel is 10 m wide at the top and 6 m wide at the bottom and the area of cross-section is 640 sq m, the depth of cannel is?