Maths while cleaning

Algebra Level 2

Two people spend 1 hour cleaning a room from a house. How much time would spend 5 people cleaning a room?

Note: Write the answer in minutes. For example if the answer is 1 hour and 30 minutes just write 90 (30+60)

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The answer is 24.

Jaime Andrés by Jaime Andrés , 21, Spain

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2 solutions

We know that the more people cleaning the room, the less time it needs. Thus:

2 × 1 5 = 2 5 = 24 m i n s \frac{2\times1}{5}=\frac{2}{5}=\boxed{24 mins}

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I don't think this kind of solution would be of any help to those users who really needs the solution. It's better to the post solutions with a little elaboration so that everyone can understand.

MD Omur Faruque - 5 years, 9 months ago
Ishita .S
Sep 3, 2015

2 people = 60 min, 1 person = 60*2=120 min, Thus 5 people = 120/5 = 24 min.

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