Question

Ellie and Elon carry 56 and 80 gallons of oxygen, respectively. The oxygen lasted for 4 days. Find the gallons of oxygen used per day.

• A. 32
• B. 34
• C. 36
• D. 38

Answer 1

The correct option is B 34

Total gallons carried by Ellie and Elon = 56 + 80 = 136 gallons
So, the gallons of oxygen required per day = 136 ÷ 4
i.e.
$$\begin{array}{c}34\\ 4136\\ -\underset{–}{12}\\ 16\\ \underset{–}{16}\\ 0\end{array}$$
So, 34 gallons of oxygen is used each day.