Question

a train having a length of 375 m travels at a speed of 45km per hour. how long will it take to pass a signal post?

Answer 1

Answer:

Step-by-step explanation:

45km/h means 12.5 meters per second. Consider that 375 means a meter, it means 375/12.5 = 30 seconds. But we don’t know the units for 375, so we assume the answer will be 30*Y, being Y the length of the units used in meters. So, suppose your unit measurement is 12 meters, a possible length of a wagon, because you are talking about 375 wagons, then the formula will be 30 * 12 = 360 seconds. If the length unit is 3 meters, then the time will be 30 x 3 = 90 seconds.