Answer:
The approximate surface area of the snowman's head is 125.33 sq.cm.
Explanation:
Formula of surface area =

We are given that The surface area of the base of the snowman is 1800 square centimetres
So,


The radius of a the head of a snowman is about 2/3 times the radius of the base of the snowman
So, Radius of head =

Surface area of snowman's head=

Hence the approximate surface area of the snowman's head is 125.33 sq.cm.