On a map with a scale of 1:4000000, the distance between a and B is 12 cm At present, a train starts from place a at the speed of 75 kilometers per hour and arrives at place B in a few hours?
The actual distance is 12 × 4000000 = 48000000cm = 480km
480 △ 75 = 6.4 hours
The actual distance between a and B is 800 kilometers. On a map with a scale of 1:4000000, what is the distance between a and B?
800 km = 80000000 cm, 80000000 × 14000000 = 20 cm; a: the distance from ground a to ground B is 20 cm