Question

1
5. A can dig
of a trench in 1 day, while B can dig of the trench in 3 days. If they work
12
together, how long will they take to dig the whole trench?
6. A and B can do a job in 15 days. They work together for 6 days and then B leaves. If A can
pes
bet 1.​

Answer 1

Answer:

Amount of work done in a day,

6

1

+

8

1

=

48

14

=

24

7

out of which

6

1

th

of the work is done by A. Hence, division of the money should be

A=

6

1

×

7

24

×1120=640

B=1120−640=480

Answer 2

Step-by-step explanation:

A's lne day work = 1/12

B's 3 days work =1/6

B's 1 day work=1/6×1/3=1/18

thus,in 1 day A and B togetger can do =1/12+1/18=3+2/36=5/36

therefore together they can do job in 1 day=5/36=36/5 hours=7 whole 1 /5 days