2. A and B together completes a piece of work in 35 days while A alone will be able to complete the same
work in 60 days. How many days will B alone take to complete the work?
3. A and B can do a piece of work in 18 days, B and C in 24 days and A and C in 36 days. In what time can
they do it all working together?
Answers
Answered by
0
Answer:
no time
the work is already done
Answered by
0
Answer:
ans for 2-84 // Ans for 3--39
Step-by-step explanation:
2)A+B= 1/35
A =1/60
B=?
1/60 + B =1/35
B = 1/35 -1/60
= 12-7 /420
=5 /420
= 1 /84
B alone takes 84 days to complete.
3) A+B =18------eq 1
B+C =24-----eq 2
A+C =36------eq 3
from eq 1 and eq 3
A+B =18
A+C=36
_______
B-C=-18 -------eq 4
_______
from eq 4 and 2
B-C= -18
B+C=24
______
2B= 6
B= 3
sub B in eq 1
A+3=18
A=15
sub A in eq 3
15+C=36
C=21
work done by all together takes = 15+3+21
= 39
hope it helps!
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