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: a fill pipe can fill 2 / 3 of cistern in 40 minutes in how many minutes , it can fill full of the cistern ? 
Options: a ) 60 min , b ) 36 min , c ) 25 min , d ) 30 min , e ) 50 min

SOLUTION: a

PROBLEM: Problem: if a man earns rs 20 on first day and spends rs 15 on second day , and earns rs 20 on third day and spends rs 15 on fourth day and goes on on which day he will be having rs 60 . 
Options: a ) 40 rs , b ) 45 rs , c ) 50 rs , d ) 55 rs , e ) 60 rs

SOLUTION: e

PROBLEM: Problem: a , b , c can complete a piece of work in 3,9 and 15 days respectively . working together , they will complete the same work in how many days ? 
Options: a ) 45 / 23 , b ) 55 / 23 , c ) 61 / 57 , d ) 12 / 13 , e ) 22 / 23

SOLUTION:
a