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a man can do a job in 15 days.his father can do it in 20 days and his son does it 25 days. if they work together how much time will it take to finish
+2
votes
214
views
asked
Feb 3, 2016
in
Class VIII Maths
by
siddhu
Basic
(
20
points)
plzz answer fast !!!
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2
Answers
+4
votes
answered
Feb 4, 2016
by
nishant kumar
Basic
(
45
points)
they will take 30 days
commented
Feb 8, 2016
by
siddhu
Basic
(
20
points)
wrong answer
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0
votes
answered
Feb 8, 2016
by
maaz
Expert
(
2.2k
points)
15x = 1
x = 15/1
20y = 1
y = 1/20
25z=1
z = 1/25
So,
d(x+y+z) = 1
d = 1/15+20+25) = 300 / 47 = 6 days
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