Kinda urgent. Help

Question

The figure shows the rectangular foundation for a new house.

What is w, the width of the foundation?

1. A.64 feet
2. B.45 feet
3. C.30 feet
4. D.25 feet

Answer 1

w² = 50² - 40² solve for w

But this looks like a 3-4-5 triangle scaled by 10, so the width is 30.