math honors 7th grade

Question

Raul is filling a 55-gallon fish tank with water. There are 18.5 gallons of water in the tank. 2.5 gallons of water flows from the hose each minute. How many gallons of water are in the fish tank after 12 minutes?

1. 
   
2. 18.5 gallons
3. 
   
4. 30 gallons
5. 
   
6. 48.5 gallons
7. 
   
8. 52 gallons

Answer 1

If every minute 2.5 gallons of water flows from the hose into the tank, then within 12 minutes

2.5 x 12 = 30 gallons of water will flow.

The tank already has 18.5 gallons of water in it. And we add 30 gallons of water. So, to find

total amount of water, we need just add those two numbers.

18.5 + 30 = 48.5 gallons.

Answer: after 12 minutes it will be 48.5 gallons of water in the tank (answer 3)