All categories

3 years ago

A pulley rotates through 107° in one minute. How many rotations does the pulley make in an hour!

Mathematics

2 answers:

nydimaria [60]3 years ago

6 0

Answer:

25 rotations

Step-by-step explanation:

To find the number of degrees it rotates in an hour, multiply 107 by 60 (since there are 60 hours in a minute). This gets us 6420. As we know, 360 degrees makes a full rotation, so we need to divide 6420 by 60. This gets us 24.6923076923. We need to round this to the nearest whole number. Since the first decimal number is a 6, we round up to 25. That means it makes about 25 rotations in an hour.

Akimi4 [234]3 years ago

3 0

Answer:

18 rotations.

Step-by-step explanation:

As there are 360 degrees in a circle, by proportion, the time for 1 rotation

= (360/107) * 1

= 3.364 minutes.

So the number of rotations in 1 hour (60 minutes)

= 60 / 3.364

= 17.83

You might be interested in

The original price of a ski jacket was $210. It was on sale at a 25% discount. Arianna had a coupon for an additional 10% off th

Anettt [7]

The answer is A, you can take 210 times .35 to get how much is taken off. Then you take 210 and subtract it by the answer you previously got

6 0

3 years ago

Read 2 more answers

A plane is a _ figure

Kryger [21]

Two deminsional or flat fuigure!

8 0

4 years ago

Read 2 more answers

2 f(x)=x2 + 2x cómo se evalúa? a) f(3) b) f(-1) c) f(x-3)

abruzzese [7]

Answer:

b) f (-1) ese es el resultado

5 0

3 years ago

A cyclist cycles a distance of 20 miles in a time of 2 hours. What is her average speed?

Mamont248 [21]

20 miles/2 hours = 10 miles/1 hour, therefore her average speed is 10mph

3 0

3 years ago

Read 2 more answers

Volume of a cone = r²h,

inessss [21]

Answer:

7.5 m 457.5 $\pi$ $m^{2}$

Step-by-step explanation:

First, visualize the original cone and the smaller cone as overlapping similar triangles. The scale factor of the original cone to the smaller cone is 50:40, so if the smaller cone has a radius of 6 m, then the radius of the original cone would be 7.5 m.

The volume of the frustum is the volume of the original cone minus the volume of the smaller cone. The formula for the volume of a cone is V = $\frac{1}{3} \pi r^{2}h$ .

Original Cone = $\frac{1}{3} \pi r^{2}h$ = $\frac{1}{3} \pi *7.5^{2}*50$ = 937.5 $\pi$

Smaller Cone = $\frac{1}{3} \pi r^{2}h$ = $\frac{1}{3} \pi *6^{2}*40$ = 480 $\pi$

Frustum = 937.5 $\pi$ - 480 $\pi$ = 457.5 $\pi$

6 0

2 years ago