Question

amit was
an athlete training
an athletic championship, the
could run 28 km in 3.5
hours, but wanted to improve his
record How long would he take
to run 40 km lat double the previous
speed​

Answer 1

Answer:

Given that a man leaves his home and walks at a speed of 12 km per hour, reaching the railway station 10 minutes after the train had departed.

If instead he had walked at a speed of 15 km per hour, he would have reached the station 10 minutes before the train's departure.

⟹ d12 is one time taken and d15 is another time taken.

The difference between these two times is 20 minutes

We have to find the distance (in km) from his home to the railway station.

20 mins is 13rd of an hour.

⟹ d12 = d15 + 13

⟹ d12 - d15 = 13

⟹ 5d−4d60 = 13

⟹ d60 = 13

⟹ d = 20 km

The distance (in km) from his home to the railway station is 20 km.

Important point to remember is that we don’t need to take the actual time here, we can take that difference of 10 minutes before and 10 minutes after which is equal to 20 minutes i.e. 13rd of an hour.

The question is "A man leaves his home and walks at a speed of 12 km per hour, reaching the railway station 10 minutes after the train had departed. If instead he had walked at a speed of 15 km per hour, he would have reached the station 10 minutes before the train's departure. The distance (in km) from his home to the railway station is: [TITA]"

Hence, the answer is 20 km