Question

If 3 men or 6 boys can do work in 20 days. 3 men or 8 boys shell takes?
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Answer 1

Answer:

The work can be completed in 20 days by 3 men or 6 boys.

Hence the capacity of 3 men = the capacity of 6 boys.

Hence if 4 men and 12 boys do the work together, than it is equivalent to,

4 + 6 = 10 men

Now the work quantum = 3 *20 = 60

Hence if now equivalent to 10 men are doing the work, then

No. of days = 60/10 = 6

Answer 2

Answer:

3 men=6 bᴏys or

1 man=2boys.

3 men and 8 boys=(2×3+8) boys = 14 boys.

ɪꜰ 6 ʙᴏyꜱ ᴄᴀɴ ᴅᴏ ᴀ ᴊᴏʙ ɪɴ 20 ᴅᴀyꜱ ᴛʜᴇɴ

20 ʙᴏyꜱ ᴄᴀɴ ᴅᴏ ᴛʜɪꜱ ᴊᴏʙ ɪɴ

$\frac{6 \times 14}{14} \\ 6$

ʜᴇɴᴄᴇ, ᴀɴꜱᴡᴇʀ=6