at a time A,do 20% less work than B.if A do any work in 15/2 hour,then in how many hour B will finish work?	Choices:
A) 5 hour
B) 11/2 hour
C) 6 hour
D) 13/2 hour
E) 8 hour
let B will finish a work in x hour.then,in x hour A,80/100=4/5 work do   ratio of work done by A and B=inverse ratio of time taken   4/5:1=2/15:1/x   4/5*1/x=1*2/15=4/5x=2/15;x=6.   time= 6 hour   answer 6 hour
<result>C</result>
at a time A,do 20% less work than B.if A do any work in 15/2 hour,then in how many hour B will finish work?