Answer:
option (d)
Step-by-step explanation:
Given,
1 ton of a particular item can be stack in= 3 man-hours
36 ton of a particular item can be stack in= 36 x 3 man-hours
= 108man- hours
Number of hours = 6 hours
Number of people =
![\frac{108 \text{man-hours}}{6}](https://img.qammunity.org/2022/formulas/physics/college/5f9nywz8lndcvpybnw6hr1mjc3nzif7r9d.png)
= 18
Hence, the number of people required is 18.
Therefore, option (d) is correct.