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qwelly [4]
3 years ago
8

Doug entered a canoe race. He rowed 3 1/2 miles in 1/2 hour. What is his average speed in miles per hour ?

Mathematics
2 answers:
Alex787 [66]3 years ago
5 0
3 1/2 miles = 7/2 miles
1/2 hours= 30 minutes
So,
In 30 mins, travelled 7/2 miles
In 1 min, travelled 7/2 ÷ 30= 7/2× 1/30 = (7×1)/(2×30) = 7/60 miles
In 60 mins, travelled (7×60)/60 miles = 420/60 miles = 7 miles.
Hence, the speed is 7 miles per hour.
UkoKoshka [18]3 years ago
5 0

Answer:

Doug's average speed is 7 miles per hour.

Step-by-step explanation:

Average speed is defined as ratio of total distance to the total time taken to cover the total distance.

Distance covered by Doug ,D=3\frac{1}{2} miles=\frac{7}{2} miles

Time taken to cover the distance D = T= \frac{1}{2} hour

Average speed :

=\frac{D}{T}=\frac{\frac{7}{2} miles}{\frac{1}{2} hour}=7 miles/hour

Doug's average speed is 7 miles per hour.

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Brilliant_brown [7]

Answer:

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Step-by-step explanation:

We solve using the formula for surface area of rectangular prism.

A=2(wl+hl+hw)

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The pool is 4 feet deep, 18 feet long, and 12 feet wide.

Hence,

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Hence,

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Cross Multiply

155 square feet × x = 672 square feet × 1 gallon of paint

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4 0
3 years ago
How is solving for speed similar to solving for time?
vichka [17]

Answer:

They both use the same units of measure.

Step-by-step explanation:

3 0
2 years ago
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SashulF [63]

Answer:

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Step-by-step explanation:

Given

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We know that diameter is twice the radius.

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