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3 years ago

If you run for 3 hours at 5 miles per hour, how far will you run? ____miles?

Mathematics

2 answers:

Westkost [7]3 years ago

4 0

Answer and Step-by-step explanation:

Simply multiply 3 by 5.

We do this because for every hour we run, we run 5 miles, and the person runs for 3 hours.

So, the answer is 15 miles.

#teamtrees #PAW (Plant And Water)

Fantom [35]3 years ago

3 0

It would be 15 miles because it’s 5 miles per hour and you run for 3 hrs so you multiply 5 times 3

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2 years ago

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2 years ago

Carl and Bob can demolish a building in 6 days, Anne and Bob can do it in 3, Anne and Carl in 5. How many days does it take all

nata0808 [166]

Answer:

59/20 days or 2.95 days

Step-by-step explanation:

Let Carl do the job in c days, Anne- in a, and Bob in b days

Then the portion of job they can do is 1/c, 1/a and 1/b

As per given we have below equations:

1/c + 1/b= 1/6
1/a + 1/b = 1/3
1/a + 1/c = 1/5

Sum of all 3 equations gives us:

2(1/a + 1/b + 1/c) = 1/6 + 1/3 + 1/5
2(1/a + 1/b + 1/c) = 5/30 + 10/30 + 6/30
2(1/a + 1/b + 1/c) = 21/30
2(1/a + 1/b + 1/c) = 7/10
1/a + 1/b + 1/c = 7/20

It means all three together can complete 7/20 of the job in one day

The rest of the job is done by Anne and Bob:

1 - 7/20 = 13/20

As Anne and Bob can do 1/3 of the job in one day, they need time to complete the rest:

13/20:1/3 = 39/20

Add 1 day to this to find overall time:

1 + 39 /20 = 59/20 days or 2.95 days

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3 years ago