Question

C, D and E can do a piece of work in in 10 days, 12 days and 15 days respectively. how long will they take to finish it if they work together?
solve it​

Answer 1

Answer:

1/4

Step-by-step explanation:

C' s 1 day work = 1/10

D's 1day work = 1/12

E's 1 day work = 1/15

in 1 day they together does = 1/10 + 1/12 +1/15

10×12+12×15+15×10

=_____________________

10×12×15

=450/1800

=1/4 hence they can do the work in 4 days