Question

the side of an equilateral triangle is increasing at the rate of 2cm/sec. at what rate is its area increasing when the side of the triangle is 20 cm

Answer 1

Area of triangle=1/2 base.height

Answer 2

hi there when the side is increased to 20 then the area would be increasing by 19.
area of triangle =(√3÷4)a^2
now try area by putting even number till twenty in that formula .