In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Q: Problem: three pipes of same capacity can fill a tank in 8 hours . if there are only two pipes of same capacity , the tank can be filled in . 
Options: a ) 11 hours , b ) 12 hours , c ) 15 hours , d ) 16 hours , e ) 17 hours

A: b
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Q: Problem: ram and shyam start a two - length swimming race at the same moment but from opposite ends of the pool . they swim in lanes at uniform speeds , but hardy is faster than andy . they 1 st pass at a point 18.5 m from the deep end and having completed one length each 1 is allowed to rest on the edge for exactly 45 sec . after setting off on the return length , the swimmers pass for the 2 nd time just 10.5 m from the shallow end . how long is the pool ? 
Options: a ) 65 , b ) 60 , c ) 55 , d ) 50 , e ) 45

A: e
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Q: Problem: if the population of a certain country increases at the rate of one person every 15 seconds , by how many persons does the population increase in 10 minutes ? 
Options: a ) 40 , b ) 100 , c ) 150 , d ) 240 , e ) 300

A:
a
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