If you want to get on the train, you should be here first.
(train station)
A coat is priced in 240 yuan, and you can get one-fifth profit when you sell it. How much is this coat? (Profit = cost times profit rate)
Solution: Let the cost be X yuan.
x×( 1+0.2)=240
x =240÷ 1.2
x =200
A: The charge is 200 yuan.
From City A to City B, three quarters are flat roads, and the rest are uphill and downhill. A car goes back and forth between A and B, and I'll give you a 20-kilometer uphill road. How many kilometers is it between A and B?
Solution: According to the meaning of the question, the distance between two cities in AB is 20÷0.25 (that is, one quarter) =80(km).
A: AB is 80 kilometers apart.
Note: In a round trip, the uphill will become downhill on the way back, so the 20-kilometer "uphill road" actually includes uphill and downhill.