instruction:
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'.
question:
Problem: working alone , pump a can empty a pool in 6 hours . working alone , pump b can empty the same pool in 9 hours . working together , how many minutes will it take pump a and pump b to empty the pool ? 
Options: a ) 192 , b ) 200 , c ) 208 , d ) 216 , e ) 224
answer:
d


question:
Problem: a 8000 liter tank , half - full of water is being filled from a pipe with a flow rate of 1 kiloliter every 2 minutes . at the same time , the tank is losing water from two drains at a rate of 1 kiloliter every 4 minutes and every 6 minutes . how many minutes does it take to fill the tank completely ? 
Options: a ) 8 , b ) 12 , c ) 18 , d ) 24 , e ) 48
answer:
e


question:
Problem: if 10 machines can produce 20 units in 10 hours , how long would it take 40 machines to produce 100 units ? 
Options: a ) 9.5 , b ) 6.4 , c ) 2.3 , d ) 8.9 , e ) 12.5
answer:

e