Question

the lengths of the sides of a triangle are in the ratio 4 : 5 : 6 and its perimeter is 60 cm. find its area correct to 4 significant figures.

Answer 1

first side - 16cm- a
second side - 20cm - b
third side - 24cm - c
s -(a+b+c) by 2
 area - √s×s-a×s-b×s-c