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3 years ago

8

A drilling machine can drill 12 holes in 6 minutes. If the machine drills holes at a constant speed, it can drill ______ holes i

n 25 minutes.

2 answers:

Nataly_w [17]3 years ago

5 0

50 might be the answer because 12÷6=2 so I just multiplied 15×2 and that equaled my answer, 50

eimsori [14]3 years ago

4 0

Answer:

50

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

If the top of a 4.50 m ladder reaches twice as far up a vertical wall as the foot of the

Free_Kalibri [48]

Answer:

4.02 meters.

Step-by-step explanation:

In the diagram, the length of the ladder is |AC|.

If the foot of the ladder is x meters from the base of the ladder

Then the distance of the ladder up the wall, AB=2x meters.

Using Pythagoras Theorem

$|AC|^2=|AB|^2+|BC|^2\\4.5^2=(2x)^2+x^2\\4.5^2=4x^2+x^2\\20.25=5x^2\\$Divide both sides by 5\\x^2=20.25\div 5\\x^2=4.05\\x=\sqrt{4.05}=2.01 feet$

Therefore, the distance of the ladder up the wall,

AB=2 X 2.01 =4.02 meters.

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3 years ago

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