TASK DEFINITION: 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'.
PROBLEM: 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

SOLUTION: d

PROBLEM: Problem: due to construction , the speed limit along an 7 - mile section of highway is reduced from 55 miles per hour to 35 miles per hour . approximately how many minutes more will it take to travel along this section of highway at the new speed limit than it would have taken at the old speed limit ? 
Options: a ) 2 , b ) 3 , c ) 4 , d ) 5 , e ) 6

SOLUTION: c

PROBLEM: Problem: a man can do a piece of work in 5 days , but with the help of his son he can do it in 4 days . in what time can the son do it alone ? 
Options: a ) 2 days , b ) 6 days , c ) 12 days , d ) 20 days , e ) none of these

SOLUTION:
d