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noname [10]
3 years ago
12

If James can swim 10 laps in 23 mins. what would be his expected time for 15 laps?

Mathematics
2 answers:
ELEN [110]3 years ago
6 0
If he can swim 10 laps in 23 mins so how long he can swim the 15 laps?
you can say:
10/23 = 15/?
so ? is the answer:
15*23/10 = 34.5 mins :)))
i hope this is helpful
have a nice day 
Wewaii [24]3 years ago
3 0
34.5
because 23 / 10 =2.3 and 2.3*15=34.5
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Answer:

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Step-by-step explanation:

Let x represent smallest number and y represent second number.

We have been given that the biggest among three numbers is 2.4 larger than the smallest one. So biggest number would be x+2.4.

We are also told that 15 times the smallest one is equal to 12 times the second and 10 times the third. We can represent this information in equations as:

15x=12y...(1)

15x=10(x+2.4)...(2)

Upon solving 2nd equation, we will get:

15x=10x+24

15x-10x=10x-10x+24

5x=24

x=\frac{24}{5}

x=4.8

Therefore, the smallest number is 4.8.

The biggest number would be x+2.4\Rightarrow 4.8+2.4=7.2.

Upon substituting x=4.8 in equation (1), we will get:

15(4.8)=12y

72=12y

y=\frac{72}{12}

y=6

Therefore, 2nd number would be 6.

Let us find sum of all numbers as:

4.8+6+7.2=18

Therefore, the sum of all 3 numbers would be 18.

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