Mr. Wang was going to the Education Bureau for a meeting. When he started, he looked at his watch and found that if he walked 100 meters per minute, he would be 6 minutes late. If he rode 200 meters per minute by bike, he could arrive three minutes ahead of time. How many minutes would he have left when he started?

Mr. Wang was going to the Education Bureau for a meeting. When he started, he looked at his watch and found that if he walked 100 meters per minute, he would be 6 minutes late. If he rode 200 meters per minute by bike, he could arrive three minutes ahead of time. How many minutes would he have left when he started?

The time to arrive on time is: (100 × 6 + 200 × 3) / (200-100) = 1200 / 100 = 12 (minutes) a: there are 12 minutes left before Mr. Wang leaves the meeting

Mr. Wang went to school for a meeting from home. When he started, he looked at his watch and found that if he walked 80m per minute, he would be 5 minutes late;
If he rides 200m per minute, he can arrive at the meeting 7 minutes in advance. How many minutes does Mr. Wang leave the meeting when he starts?

200×（7+5）÷（200-80）
=200×12÷120
=20 points
20-5 = 15 points
Mr. Wang left the meeting for 15 minutes

Mr. Wang was going to the Education Bureau for a meeting. When he started, he looked at his watch and found that if he walked 100 meters per minute, he would be 6 minutes late. If he rode 200 meters per minute by bike, he could arrive three minutes ahead of time. How many minutes would he have left when he started?

The time to arrive on time is: (100 × 6 + 200 × 3) / (200-100) = 1200 / 100 = 12 (minutes) a: there are 12 minutes left before Mr. Wang leaves the meeting