Xiao Pang and Xiao Ding start from both ends of the same road at the same time by bike. Xiao Pang travels 250 meters per minute and Xiao Ding 200 meters per minute. They are walking away from each other 200 meters. How long is the road?

Xiao Pang and Xiao Ding start from both ends of the same road at the same time by bike. Xiao Pang travels 250 meters per minute and Xiao Ding 200 meters per minute. They are walking away from each other 200 meters. How long is the road?

Is it the distance from the midpoint meter
So xiaopang drives 200 × 2 = 400 (m) more than Xiaoding
Time: 400 ÷ (250-200) = 8 (min)
Length: (250 + 200) × 8 = 3600 (m)

Xiao Pang and Ding Ding ride bicycles from both ends of the same road at the same time. Xiao Pang travels 250 meters per minute and Ding Ding 200 meters per minute. They meet 200 meters from the midpoint. How long is the road?

Suppose the road is x meters long
(1/2x+200)/250=(1/2x-200)/200
4(0.5x+200)=5(0.5x-200)
2x+800=2.5x-1000
0.5x=1800
x=3600
The road is 3600 meters long

Starting from school, walking will be 6 minutes late for the meeting, cycling 3 minutes in advance, walking 100 meters per minute, cycling 200 meters per minute

There will be X minutes left before departure
Then: (x + 6) * 100 = (x-3) * 200 (same distance)
Solve the equation: x = 12 (minutes)

On a straight road, a and B start from a and B at the same time, 900 meters apart. A travels 200 meters per minute and B 250 meters per minute
How long does it take for them to be 2700 meters apart!

(1) They began to walk in opposite directions;
Time = (2700 + 900) △ 200 + 250) = 3600 △ 450 = 8 minutes;
(2) Start to go in the same direction, a to catch up with B;
Time = (2700-900) △ 250-200) = 1800 △ 50 = 36 minutes;
(3) Start to go in the same direction, B to catch up with a;
Time = (2700 + 900) △ 250-200) = 3600 △ 50 = 72 minutes;
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