In the figure, PQRS is a rectangle. If the shaded area is 72 sq. cm,…

In the figure, PQRS is a rectangle. If the shaded area is 72 sq. cm, find h.

Correct Answer: Option D

Explanation

From the diagram, PQRS is a rectangle
Area of shaded part = 72sq.cm
But 72 = 3h – 4 + 6h – 4 + 4h
= 72 – 16h – 8
= 16h – 72 + 8
=16h = 80
h = (frac{80}{16})
= 5cm