1. A and B can do a piece of work in 25 days and 35
days. Both starts the work together for some time,
but B leaves the job 7 days before the work is
completed. Find the time in which work is finished.
1
(a) 17days
(b) 173 days
(c) 18 days
(d) 20 days
Answers
Answered by
2
Step-by-step explanation:
Supose A left after x days Then Work of (A + B) for x days =
28
x
+
35
x
Work of B for 17 days =
35
17
∴
28
x
+
35
x
+
35
17
=1⇒
140
5x+4x
=1−
35
17
=
35
18
⇒
140
9x
=
35
18
⇒x=
35×9
18×140
=8 days
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