• # question_answer If all the sides of a triangle be increased by 200 per cent, what is the corresponding increase in its area? A) 300%                           B) 400% C) 600%                           D) 800%

Let sides are a, b, c. So, new sides are 3a, 3b, 3c. Original area $=2l+2b$ So, new area $=2(l+b)$ Increased area 9 K - K = 8K % = 800%.