Question

the time interval between a lightning flash and the first sound of thunder was found to be 5s.If the speed of sound in air is 330m/s,find the distance of the flash from the observer.

Answer 1

So the distance traveled by sound will be the distance between the observer and the lightning strike 

so the time lag between the light and sound is 5 s 

so d = 330 x 5 = 1650 m = 1.65 km ANSWER

Answer 2

given,
time interval = 5 sec.
speed acquired = 330 m/s
∴ distance ,
speed = distance / time
330 = distance / 5
330*5 = distance
1650 = distance.
∴ distance = 1650 meter.
            i hope that this will help u..............^_^