Question

A 40 foot long escalator rises from the first floor to the second floor of a shopping mall. The escalator makes a 30 degree angle with the horizontal. How high above the first floor is the second floor?

Answer 1

Question

The height is $h = 40 \cdot \sin 30{}^{\circ} = 40 \cdot \frac{1}{2} = 20$ feet.

Answer: 20 feet.