Question

Guna are fired at an interval of 21 minutes from a particular place . A man coming towards that place heard the sound at an interval of 20 minutes 15 second . If the speed of the sound is 360 meter per second, what is the speed of the man in kilometer per hour.​

Answer 1

Step-by-step explanation:

let the speed of the train be xm/s. Then

distance travelled by train in 10 min=

distance traveled by sound in 30sec.

=x*10*60= 330*30

x=330*30/10*60=16.5

speed of train be 16.5m/s

18/5=59.4km/hr