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25 votes
Question 27

Question stimulus material
Marcus uses a hose to fill a swimming pool with water.

He knows it takes about 1 minute to fill a 10-litre bucket.

The pool has a capacity of 60 000 litres.

The pool is already three-quarters full.

What is the best estimate of the time it will take to fill this pool?

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User Didil
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10 votes

Answer:

Explanation:

What is 3/4 full mean in this question? It means that you take 3/4 of 60000 and that's how many liters are already in the pool. Your job is to fill the remainder using the rest of the information.

3/4 * 60000 = 45000

There are already 45000 liters in the pool.

You need to put in an addition 60000 - 45000 = 15000 liters

So how many 10 L buckets do you have to fill to get 15000?

15000 / 10 = 1500

You need to fill 1500 buckets to get the pool filled.

Since 1 bucket takes 1 minute, it will take 1500 minutes to fill the pool.

1500 minutes * 1 hour / 60 minutes = 25hours

Answer: 25 hours or 1 day and 1 hour

User Leo Galleguillos
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