Question

the base of a triangle is increase by 2% and height is decrease by 25% . what is the change in the area of a triangle​

Answer 1

Answer:

let the base be = 20

and height = 10

area = 1/2*base*height

= 1/2*20*10 = 100

base increased by 2% = 20.4

height decreased by 25% = 7.5

new area = 1/2*20.4*7.5 = 76.5

change in area 100-76.5 = 23.5

or 23.5%