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 train is 410 meter long is running at a speed of 45 km / hour . in what time will it pass a bridge of 140 meter length 
Options: a ) 20 seconds , b ) 44 seconds , c ) 40 seconds , d ) 50 seconds , e ) none of these

SOLUTION: b

PROBLEM: Problem: a car traveling at a certain constant speed takes 10 seconds longer to travel 1 km than it would take to travel 1 km at 80 km / hour . at what speed , in km / hr , is the car traveling ? 
Options: a ) 70 , b ) 72 , c ) 74 , d ) 65 , e ) 78

SOLUTION: d

PROBLEM: Problem: a man swims downstream 96 km and upstream 64 km taking 4 hours each time ; what is the speed of the current ? 
Options: a ) 6 , b ) 4 , c ) 2 , d ) 8 , e ) 5

SOLUTION:
b