Question

Answer the question Quickly.

Answer 1

Let the sides of the triangle be 3x cm, 4x cm and 5x cm.

Perimeter of the triangle = 144 cm

∴ 3x + 4x + 5x = 144

⇒ x = 12

So, the sides of the triangle are 36 cm, 48 cm and 60 cm.

Semi perimeter of triangle, s = 72 cm
Area of triangle=864cm²

Longest side = 60 cm

Also, area of triangle =(b×h)/2
864×2=b×h
1728=60×h
h=28.8cm