Headwind: 6*24= 144 (km)
(If the wind direction is favorable, the first one is needed; if the wind direction is unfavorable, the second one is needed. )
A: The distance between the two cities is 132( 144) kilometers.
2、3+4=7
4-3= 1
54*7=378 (person)
A: There are 378 people in Workshop A and Workshop B. ..