Question

calculate the amount öf air inside a conical tent with base radius 7 m and height 12 m

Answer 1

given that 
in the cone 
height = 12 m
radius = 7 m
the volume of the cone = 1/3 πr²h
= 1/3 ×22/7×7×7×12   
= 616 m³.

Answer 2

we given that  
height = 12 m
radius = 7 m
so,
the volume of the cone = 1/3 πr²h
= 1/3 ×22/7×7×7×12   
= 616 m³.