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What is the diameter?
Spl
(6.5 cm)

what is the diameter of 6.5 cm ?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?