Rapid Fire Round with Ujjvala Ma'am | Can he answer this in 30 seconds?

Two guns were fired form the same place at an interval of 10 minutes and 30 seconds, but a person in the train approaching the place hears the second shot 10 minutes after the first. The speed of the train (in km/hr), supposing that sound travels at 330 metres per second, is

A and B start running at the same time and from the same point around a circle. If A can complete one round in 40 seconds and B in 50 seconds, how many seconds will they take to reach the starting point simultaneously ?

All light was seen at interval if 30 seconds It was seen of the fisrt line at 1 hr.54 min 50 seconds a.m and the last time at 3 hrs 17 min 49 seconds a.m.How many xx was the light seen?

Two bullets are fired from a place at an interval of 5 minutes. A person approaching that place hears it at the gap of 4 minutes, 30 seconds. If speed of sound in 330 m/s then what is the speed of person (in km/ h).

A gun is fired at a distance of 3.32 km from Chauhan. He hears its sound 10 seconds later. Find the speed of the sound.

Your friend Veer wants to participate in a 200m race. He can currently run that distance in 51 seconds and with each day of practice it takes him 2 seconds less.He wants to do in 31 seconds . What is the minimum number of days he needs to practice till his goal is achieved