# Six speeds

A drilling machine is to have six speeds ranging from 50 to 750 revolutions per minute. If the speed forms a geometric progression, determine their values.

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**algebra**- equation
- exponential equation
- geometric progression
**arithmetic**- cube root
- square root
- exponentiation

### Units of physical quantities:

### Grade of the word problem:

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