Question

the sides of an rectangle are 20 cm and 15 cm/,if each size is increased by 20%,find the percentage increase in the area\

Answer 1

Answer:

44% Increase

Step-by-step explanation:

Length of rectangle = 20 cm

Breadth of rectangle = 15 cm

Area = Length * Breadth = 20 * 15 = 300 cm^2

Percentage of increase in length and breadth = 20%

New length = 20 + (20/100 * 20) = 20 + 4 = 24 cm

New breadth = 15 + (20/100 * 15) = 15 + 3 = 18 cm

New area = 24 * 18 = 432 cm^2

Amount of increase = 432 - 300 = 132 cm^2

% Increase in area = 132/300 * 100 = 44%