First of all, we know that 15 minutes is 0.2 times the time, so the fast group has finished climbing: 15÷0.2=75 minutes, and the slow group has finished climbing.

Used: 75× 1.2=90 minutes; This makes the calculation speed easier.

A set of fast speeds is: 450÷75= (m/min); A set of fast speeds is: 450÷90=5 (m/min).

A: The speed of the fast team is 6 meters per minute, and the speed of the slow team is 5 meters per minute.

Fractional equation solution: let the slow group be x meters per minute and the fast group be 1.2X meters per minute.

Solution: 450/x-450/1.2x =15 If both sides are multiplied by1.2 and x, it is 540-450= 18X.

18X=90 X=5 (rice, slow group) 5x1.2 = 6 (rice, fast group)

A: The speed of the fast team is 5 meters per minute, and the speed of the slow team is 6 meters per minute.