a an do a piece of work in 30 days while b alone can do it in 40 days. in how many days can a and b working together do it?
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Answered by
2
in this problem
lcm is work
30 , 40 lcm = 120 unit work
one days work of each i
120/30 = 4 unit
and
120/40 = 3 unit
they together one days work is
4 + 3 = 7 unit
120/7 = 17.14 days
lcm is work
30 , 40 lcm = 120 unit work
one days work of each i
120/30 = 4 unit
and
120/40 = 3 unit
they together one days work is
4 + 3 = 7 unit
120/7 = 17.14 days
Answered by
1
Answer:
let the work be lcm
Step-by-step explanation:
then
30,40 = 120 unit work
one day work of each =
120/30= 4 units
AND
work done by B
= 120/40 = 3 units
they together do work in one day = 4+3
= 7 units
No. of days they take to do work = 120/7
= 17.14 days
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