Question

16) A, B and C can do a piece of work in 36, 54 and
72 days respectively. They started the work but A left
8 days before the completion of the work while B left
12 days before the completion. The number of days for
which C worked is
A) 4
B) 8
C) 12
D) 24
17) A cuboid whose length is equal to its width has a
volume of 24 cubic feet. If the height of the cuboid is​

Answer 1

2 days

A : B : C

12:15:20

<60>

5:4:3

work was completed in 6 days

in these days A and B was continually working it means

5+4= 9 units was completed per day by A and B

then

in 6 days = 6×9=54 unit

rest of units done by C

60-54=6

C's efficiency 3 unit per day

C completed 6 unit by = 6÷3= 2 days