1。 A ship travels from Port A to Port B at a speed of 40 kilometers per hour and arrives in 9 hours. The ship returned from port B to port A at a speed of 20 kilometers per hour. How far is it from Port A to Port B? How many hours does it take to return to Port A?

40×9=360 km

It's 360 kilometers from Port A to Port B.

360 degrees (40+20)=6 hours

It takes six hours to return to port a.

2. Liu Min learns to draw by riding a bicycle in the Kadao Children's Palace. She drove at a speed of 240 meters per minute 15 minutes to the Children's Palace, and found that she didn't bring her drawing pen, so she hurried home, shortening it by 3 minutes. How many meters does she walk home every minute?

240×15 ÷ (15-3) = 300m.

Walk 300 meters home every minute.