Question

A diver swims 20 m under water to the anchor of a buoy that is 10 m below the surface of the water. On the surface how far is the buoy located from the place where the diver started?

Answer 1

There the buoy is 17.3 m from the place where the diver started.

Explanation:

a² + b² =c²

⇒ 10² + b² = 20²

⇒ 100 + b² = 400

⇒ b² = 400 - 100

⇒ b²= 300

⇒ b =
`√(300)`

⇒ b = 17.3 m

There the buoy is 17.3 m from the place where the diver started.