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Mademuasel [1]
3 years ago
9

A boat moves 15.0 km across a lake in 30.0 min. what was the average speed of the boat in kilometers per hours?

Mathematics
1 answer:
Katen [24]3 years ago
4 0

To work out the average speed you would have to use the formula

AS = 15.0 ÷ 30.0 = 0.5 which is distance divided by time.

The you would do 0.5 x 60 = 30 (60 minutes = 1 hour)

So the average speed would be 30.0 km/h.

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4 0
3 years ago
Will, Mike, and Sue went to dinner. Will paid 1/3 of the dinner bill. Micah and Sue paid in the ratio 2:3. If Sue paid $6 more t
raketka [301]
Let's call their parts w,m and s

if will paid 1/3, then m+s=2w (they paid 2/3, which is twice as much as will did)

Now, we know that:
Micah and Sue paid in the ratio 2:3.
this means the 3m=2s

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and we substitute m:
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we also know that s=w+6 (from the last sentence) so we substitute:

5(w+6)=6w
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so, Will paid 30, Sue paid 36 (six more than him), Mike paid 24 (24:36 is the same ratio as 2:3, you can check this by dividing both 24 and 36 by 12: you have 2 and 3)

and the total was 30+36+24=90.





3 0
4 years ago
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