Question

12 men or 15 women can finish a work in 24 days. In how many days the
same work can be finished by 8 men and 8 women?
(2018)
(A) 16 days (B) 20 days (C) 24 days (D) 28 days
answer step by step in easy method​

Answer 1

Answer:

15 Women can do a work in 24 Days. Therefore, 18 women--------------------------(24 × 15)/18 Days. = 20 Days. Thus, 8 men and 8 women can complete the Work in 20 Days.

Answer 2

12 men did the work in 24 day.

So 1 men will do this work in 12×24 =288 day.

8 men will do this work in 288/8=36day

8 men will do 1/36 of the work in 1 day.

Like this ; 15 women did the work in 24 day….1 women will take 15×24=360day. 8 women will do this work in 360/8=45day.

8 women will do 1/45 of the work in 1 day.

So 8 men & 8 women will do this work in 1 day=1/36+1/45=1/20 of the work.

8 men & 8 women will finish the work in 1÷1/20=1×20/1=20 days