Joseph and alia can finish science project in 18 hours and 15 hours respectively. find.
work done by Joseph in 6 hours.
work left after Joseph has worked for 6 hours.
time required by Aliya to finish the remaining work.
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Step-by-step explanation:
Time taken by joseph complete a work = 20 hours.
Time taken by Aliya to complete a work = 25 hours
Joseph's one hour work = 1/20
Peter's one hour work=1/25
So both joseph' and Aliya work in one hour = 1/20 + 1/25
taking LCM = ( 5+ 4 )/ 100 = 9/100
work done by both together in 4 hrs =
100
9
×4=
25
9
Work left after both worked together for 4 hrs =1−
25
9
=
25
(25−9)
=
25
16
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