Two buses are moving in opposite directions with velocities of 36 km/hr and 108 km/hr. Find the distance between them after 20 minutes.

Explanation:

It is given that,

Speed of bus 1 is 36 km/h and speed of bus 2 is 108 km/h. We need to find the distance between bus 1 and 2 after 20 minutes.

Time = 20 minutes =

As the buses are moving in opposite direction, then the concept of relative velocity is used. So,

Distance,

v is relative velocity, v = 108 + 36 = 144 km/h

So,

So, the distance between them is 48 km after 20 minutes.

a is the best answer your welcome

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the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia