Question

A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in how many days?

Answer 1

Answer:

$16 + 12 + 4 \\ 32$

next

$16 \times 4 \\ = 64$

$64 \times 12 = what \: this \: is \: your \: answer$