# Calculate 81492

Jirka went on a moped for a three-day trip.

He drove 90 km on the first day, 30 km on the second day, and 60 km on the third day.

He always drove at the same average speed and always the whole number of hours.

Calculate the average speed if Jirka drove at the highest possible speed.

He drove 90 km on the first day, 30 km on the second day, and 60 km on the third day.

He always drove at the same average speed and always the whole number of hours.

Calculate the average speed if Jirka drove at the highest possible speed.

## Correct answer:

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

**statistics**- mean
**algebra**- prime numbers
- least common multiple (LCM)
- greatest common divisor (GCD)
**basic functions**- maximum
**numbers**- fractions

#### Units of physical quantities:

#### Themes, topics:

#### Grade of the word problem:

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