Question

Q12) a) A, B and C together can do a work in 6 days. A alone can do the work in
18 days and B alone can do it in 15 days. How long will C take to do the work
alone?
(2)
b) What will be the volume of a cube with the length of each edge as 8 cm?(1)​

Answer 1

Answer:

a) 22 1/2

b)512

Step-by-step explanation:

a) given,

A, B and C together can do a work in 6 days.

A+B+C=1/6

A alone can do the work in   18 days

A=1/18 days

B alone can do it in 15 days.

B=1/15

C=1/6-A-B

C=1/6-1/18-1/15

C=15-5-6/90

C=4/90

C=90/4=>22 1/2

b) volume of cube is a^3

 given edge=8

 8^3=512