An air conditioner can cool the hall in while another takes to cool under similar conditions. If both air conditioners are switched on at the same instance then how long will it take to cool the room approximately?
Correct option: (c )
Let the two conditioners be and
We know that,
The capacity of and capacity of
So, when both the air conditioners are turned on at the same time, the combined capacity will be the addition of the capacity of both the air conditioners.
So, the combined capacity of and is
Now, we know that
The air conditioner and air conditioner together take approximately to cool the room.
Hence, option C is correct.