General Knowledge - Physics - Discussion

We know that speed = distance/time.
Therefore , distance = speed*time.

D1 = 300*5 = 1500 m/sec.
D2 = 300*6 = 1800 m/sec.

Total distance(max) = D1+D2 = 1500+1800 = 3300 m/sec = 3300/1000 = 3.3 km(as 1 m = 1/1000 km).

Min distance = D2-D1 = 1800-1500 = 300m/sec = 300/1000 = 0.30 km.
So, The max distance taken = 3.3km and the min distance taken = 0.30 km.

They might be at the same direction or opposite.

At the same person B hears the sound after 1 second after person B. So there distance is 300m.

SOUND----------A--B.

But at different direction person A takes 5 seconds and person B takes 6 seconds. So there distance is the distance covered by sound at a speed of 300 m/s for (5+6) 11 seconds.

A----------SOUND------------B.

@Annu Paraas.

300 m is equal to 0.3 km, not 3.3 km.

Distance = Velocity * Time.

Hence distance to first person = 5 * 300 = 1500 m = 1.5 km.
Distance to second person is = 6 * 300 = 1800 m = 1.8 km.

Then.
The maximum distance is = 1.5 + 1.8 = 3.3 km.
And minimum distance is = 1.8 - 1.5 = .30 km.

Time ratio = 5:6
Speed ratio = 6:5

Given 1 part difference is 300 m/s.

=> 6 parts is 1800 m/s or 1.8km & 5 parts is 1500 m/s or 1.5km.

Max distance is 6 + 5 = 11 parts, => 1800 + 1500 = 3300 m/s or 3.3 km &
Min distance is 6 - 5 =1 part, => 1800 - 1500 = 300m/s or.3km.

Maximum Dist=speed*time
=300*(6+5)
=300*11
=3300.

Therefore we will now convert metre to kilometer:
3300/1000=3.3km.

Minimum Dist=speed * time,
=300*(6-5),
=300*1,
=300m.

we will also convert metre to kilometre.
300/1000=0.3km.

Speed of sound = 300 m/s
distance travelled in 5 second = 300 * 5 = 1500m.
distance travelled in 6 second = 300 * 6 = 1800m.

If they are on the opposite side of the source, the distance will be maximum
D = 1500+1800 = 3300m.

If they are on the same side of the source, the distance will be minimum
D = 1800-1500 = 300m.

So, the maximum distance is 3300m and the minimum distance is 300m.