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3 years ago

A railway tunnel 147m long is to be bored with a circular cross section of radius 5m.what volume of soil has to be excavated?

1 answer:

8 0

We have to find the volume of the cylinder, where: r = 5 m and h = 147 m.
V = r² h π
V = 5² · 147 · 3.14 = 25 · 147 · 3.14 = 11,539.5 m³
Answer:
11,539.5 m³ of soil has to be excavated.

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Jamie has $30 in a savings account. The interest rate is 10% per year and is not

erastova [34]

Answer:

the answer is 30 * 0.10 * 3

Step-by-step explanation:

the equation is money * interest * time

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3 years ago

ryan takes a 30 centimeter by 72 centimeter sheet of paper and cuts from one corner of the paper to diagonally opposite corner.

nikklg [1K]

Answer:

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patriot [66]

6 under par is written as -6

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2 years ago

Give the measure of angle C. <br>20° <br>180°<br>70°<br>110°

tigry1 [53]

Answer:

C=110

Step-by-step explanation:

Angle C and the angle labeled 110 are alternate interior angles if the lines are parallel. Alternate interior angles are equal

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2 years ago

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maksim [4K]

Answer:

$\boxed {\boxed {\sf 250 \ people}}$

Step-by-step explanation:

Let's set up a proportion using the following setup.

$\frac {buses}{people}=\frac {buses}{people}$

We know 30 buses can carry 1,500 people.

$\frac {30 \ buses}{1500 \ people}=\frac {buses}{people}$

We don't know how many people 5 buses can carry, so we say 5 buses carry x people.

$\frac {30 \ buses}{1500 \ people}=\frac {5 \ buses}{x \ people}$

$\frac {30 }{1500 }=\frac {5 }{x }$

Cross multiply. Multiply the numerator of the first fraction by the second fraction's denominator. Then, multiply the first denominator by the second numerator.

$30*x=1500*5\\30x=7500$

Solve for x. It is being multiplied by 30. The inverse of multiplication is division. Divide both sides by 30.

$30x/30=7500\\x=250$

5 buses can carry 250 people.

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3 years ago