Question

If 20 men or 30 boys can do a piece of work in 36 days, in how many days will 10 men and 12 boys
do

Answer 1

Answer:

20 Men or 30 Boys can do a job in 36 days. So, we can say 20 Men are equivalent to 30 Boys i.e. 2Men = 3Boys.

Now, TOTAL WORK = 20 ×36 = 720 Mandays = 720 MD

10 Men and 12 Boys = 10Men + 12Boys = 18 Men

So, TOTAL TIME = 72018 = 40 Days (Answer)

Answer 2

Answer:-

40 Days

Step-by-step explanation:

20M × 36 = 30B×36

M/B = 3/2

That is , M -> 3

B -> 2

Now, Total Workdone = 20M×36 = 20× 3×36 = 2160

So , (10M + 12B)×D= Total Workdone

(10×3 +12×2)×D= 2160

(30+24)×D= 2160

D = 2160/54 = 40days