Here, we are given that sides of one triangular piece of cloth are of length 20 cm, 50 cm and 50 cm respectively.
Semi-perimeter of the triangular piece
s = \(\frac { 20+50+50 }{ 2 }\)
⇒ s = 60
Area of cloth of each colour required for the umbrella
= 10 x 200√6 cm2 = 2000√6 cm2.