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: a can finish a work in 18 days and b can do same work in half the time taken by a . then working together , what part of same work they can finish in a day 
Options: a ) 1 \ 5 , b ) 1 \ 6 , c ) 1 \ 7 , d ) 1 \ 8 , e ) 1 \ 9
answer:
b


question:
Problem: 28 machines can do a work in 10 days . how many machines are needed to complete the work in 40 days ? 
Options: a ) 10 , b ) 6 , c ) 4 , d ) 7 , e ) 5
answer:
d


question:
Problem: light glows for every 17 seconds . how many times did it between 1 : 57 : 58 and 3 : 20 : 47 am 
Options: a ) 291 , b ) 292 , c ) 293 , d ) 384 , e ) 285
answer:

c