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'.
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Question: Problem: if the product of two numbers is 45276 and their h . c . f . is 22 , find their l . c . m . 
Options: a ) 2574 , b ) 2500 , c ) 2100 , d ) 2058 , e ) none of these

Answer: d


Question: Problem: in what time will a train 140 meters long cross an electric pole , if its speed is 210 km / hr 
Options: a ) 5 seconds , b ) 4.5 seconds , c ) 3 seconds , d ) 2.4 seconds , e ) none of these

Answer: d


Question: Problem: a and b can do a piece of work in 6 days . with the help of c they finish the work in 4 days . c alone can do that piece of work in ? 
Options: a ) 10 days , b ) 20 days , c ) 25 days , d ) 15 days , e ) 45 days

Answer:
b