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 and b together can do a piece of work in 10 days . b alone can finish it in 20 days . in how many days can a alone finish the work ?
Options: a ) 20 , b ) 10 , c ) 15 , d ) 5 , e ) 7

SOLUTION: a

PROBLEM: Problem: how long does a train 165 meters long running at the rate of 54 kmph take to cross a bridge 660 meters in length ?
Options: a ) 55 sec , b ) 40 sec , c ) 45 sec , d ) 30 sec , e ) 35 sec

SOLUTION: a

PROBLEM: Problem: what is the maximum number of pieces of birthday cake of size 4 " by 4 " that can be cut from a cake 16 " by 16 " ?
Options: a ) 5 , b ) 4 , c ) 16 , d ) 20 , e ) 25

SOLUTION:
c