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: if 36 men can do a piece of work in 5 hours , in how many hours will 15 men do it ? 
Options: a ) 12 , b ) 38 , c ) 60 , d ) 88 , e ) 72

A: a
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Q: Problem: convert 500 miles into meters ? 
Options: a ) 784596 , b ) 845796 , c ) 804670 , d ) 784596 , e ) 864520

A: c
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Q: Problem: the length of the bridge , which a train 135 metres long and travelling at 45 km / hr can cross in 30 seconds , is ? 
Options: a ) 76 m , b ) 178 m , c ) 240 m , d ) 187 m , e ) 176 m

A:
c
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