Question

Help soon pls!!!!!

A water drilling rig is drilling at a constant rate. At 5:00 the drill is at a depth of 5 feet. Twenty minutes later the drill is at a depth of 9 feet.

How many more minutes will it take for the drill to reach a depth of 15 feet?

Answer 1

30 minutes

Explanation:

It took 20 minutes to progress from 5 to 9 feet meaning it goes 1 foot every 5 minutes. 15 - 9 is 6 and 6 * 5 = 30 meaning in 30 minutes it will reach 15 feet.