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Given that the waste tap can empty the filled tank in 32 min.

Now, the rate at which the waste tap can empty the tank = (40 + 60)8/32 = 100/4 = 25 lit/min.

Given that three athletes can complete one round around a circular field in 16, 24 and 36 min respectively.

Now, required time after which they met for the first time = LCM of (16, 24 & 36) min

Now, LCM of 16, 24, 36 = 144 minutes = 2 hrs 24 min.

All the above given options are the examples of social interaction. In sociology, interactions are of five types.They are :

1) Exchange

2) Competition

3) Cooperation

4) Coercion

5) Conflict

CH3COOH, chemically known as Acetic acid, is not a strong acid among the given acids like Sulphuric acid, Hydrochloric acid,...

In DNA, the chemicals are Adenine, thymine, guanine and cytosine. They always pair as basepairs like Adenine with Thymine and Guanine with Cytosine.

Systems biology is mainly an attempt to understand the behavior of entire biological systems by studying interactions among its component parts.

Here in the above given question, the mistake is "the is reapeated twice" before mistake.

The Basic Speed Law states that you must never drive faster than is safe for present conditions, regardless of the posted speed limit.

For example, if you are driving 60 kmph in 45 kmph zone, you are not in safe driving and you just not following the speed law.