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The two vehicles leave a and B at the same time. A travels 48 kilometers per hour and B 54 kilometers per hour. When they meet, they are 21 kilometers away from the midpoint. How far is the distance between them? If yes, add 20!
21 × 2 ÷ (54-48) = 7 (hours)
Distance: (54 + 48) × 7 = 714 (km)
Car a and car B leave the two places at the same time along the highway. Car a travels 48 kilometers per hour on average, and car B 54 kilometers per hour on average. When they meet, they are 36 kilometers away from the midpoint of the two places. How many kilometers are there between the two places?
Driving time when meeting: 36 × 2 ^ (54-48), = 72 ^ 6, = 12 (hours); distance between the two places: (48 + 54) × 12, = 102 × 12, = 1224 (km); answer: the distance between the two places is 1224 km
The passenger car and the freight car travel 54 km and 48 km respectively from the two stations at the same time. After the two cars meet, they advance at the same speed
Return immediately after arriving at the other station. When the two cars meet each other, the bus runs 21.6 kilometers more than the truck. How many kilometers is the distance between the two stations?
Time to meet again
=21.6÷（54-48）
=21.6÷6
=3.6 (hours)
At this time, the two cars had a total of three whole journey between a and B stations
It will take two cars a whole journey
=3.6÷3
=1.2 (hours)
The distance between a and B
=（54+48）×1.2
=102×1.2
=122.4 (km)
Both passenger and freight cars leave from station a and station B at the same time. The passenger car travels 54km per hour, while the freight car travels 48km per hour. After meeting each other, they advance at the same speed and return to the opposite station immediately
When the two cars meet each other, the bus runs 21.6 kilometers more than the truck. How many kilometers is the distance between station a and station B? (please use the formula)
(54 + 48) * 21.6 / {3 * (54-48)} = 122.4km
A: the distance between station a and station B is 122.4 km
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