Answer:
A) x = 44,72 m
Explanation:
A rectangular shape means two dimensions width (w) and length (l) and the internal angles are of 90⁰; therefore if we know one of its side, and a diagonal (d) we can calculate the other side, using Pytagoras Theorem, then:
x² + l² = d²
x² = d² - l² ⇒ x² = (60)² - (40)² ⇒ x² = 3600 - 1600
x² = 2000
x = √2000
x = 44,72 m