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pshichka [43]
3 years ago
7

Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute and Gear Q mak

es 40 revolutions per minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revolutions than gear P ?
A. 6
B. 8
C. 10
D. 12
E. 15
Mathematics
1 answer:
marysya [2.9K]3 years ago
6 0

Answer:

12 minutes

Option D

Step-by-step explanation:

Given that circuar gears P and Q start rotating at the same time at constant speeds.

Gear P makes 10 revolutions per minute and Gear Q makes 40 revolutions per minute.

Both gears start at the same time.

No of rotations per minute are 10 and 40

Difference is 30 in one minute

For 6 difference we must have exactly 1/5 minutes

which equals 12 seconds.

In 1/5 minutes or 12 seconds  gear P would have completed 2 revolutions while Gear Q would have completed 8 revolutions thus making difference as 6.

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The question is below​
Cloud [144]

Answer:

See below.

Step-by-step explanation:

a.

The first figure has 1 square. The second figure has a column of 2 squares added to the left. The third figure has a column of 3 squares added to the left. Each new figure has a column of squares added to the left containing the same number of squares as the number of the figure.

b.

Figure 10 has 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55 squares.

c.

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For figure 55, n = 55.

n(n + 1)/2 = 55(56)/2 = 1540

d.

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e.

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3 years ago
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Answer:

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D the Escrow Account
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JulijaS [17]
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B:

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3 years ago
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