Wei Zi and the rabbit race.

The tortoise and the rabbit set out from the same place in opposite directions and ran on the 750-meter-long circular runway. Rabbits run 45 meters per minute and turtles run 5 meters per minute. 15 minutes later, they met. After meeting, the rabbit ran 600 meters more than the tortoise.

According to the meaning of the question, you can calculate:

Meeting time: 750÷(45+5)= 15 minutes.

Rabbits run more than turtles after the meeting: 15×(45-5)=600 meters.

So they met in 15 minutes. After meeting, the rabbit ran 600 meters more than the tortoise.

Extended data:

The dividend is enlarged (reduced) by n times, and the quotient is correspondingly enlarged (reduced) by n times under the condition that the divisor is unchanged. The divisor is expanded (reduced) by n times, while the dividend is unchanged, and the quotient is correspondingly reduced (expanded) by n times.

Dividing by two divisors in succession is equal to dividing by the product of these two divisors. Sometimes simple operations can be performed according to the nature of the division.

For example: 300 ÷ 25 ÷ 4 = 300 ÷ (25× 4) = 300 ÷100 = 3.