Question

4. A and B can do a piece of work in 10 hours. B and C can do it in 15 hours,
while A and C take 12 hours to complete the work B independently can
complete the work in
(a) 12 hours (b) 16 hours (c) 20 hours (d) 24 hours​

Answer 1

Answer:

OPTION (D) IS THE RIGHT ANSWER.

24 HOURS.

Step-by-step explanation:

A's and B's 1 h work = 1/10

B's and C's 1 h work = 1/15

and A's and C's 1 h work = 1/12

A's, B's and C's 1 h work = 12(110+115+112)

=12×14=18

B's work in 1 h = 18−112=124

B independently can complete the work in 24 h.

I HOPE YOU UNDERSTAND NOW.