option C

from Q stem we can draw a triangle similar to the one in attachment. however we need to know two more variables.

st1 gives the height of the post but this doesnt say anything about the length of shadow.

st2 gives the distance between the man and the post and this doesnt give the length of the shadow.

combining st1 & st2 we can find the length of the shadow as 4 (however not needed)

Attachments

1.jpg [ 9.65 KiB | Viewed 1039 times ]

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Help with kudos if u found the post useful. Thanks