Maths-
General
Easy
Question
A hemispherical tank is made up of an iron sheet 1 cm thick. If the inner radius is 1m , then find the volume of the iron used to make the tank ?
Hint:
The volume of hemisphere is 
.
The correct answer is: 0.06348m3
Explanation:
- We have given a hemisphere with thickness 1cm.
- We have to find the volume of iron used to make the tank.
Step 1 of 1:
Since the hemispherical tank is made of 1cm thick iron, we can find the outer radius of the tank by adding thickness to the inner radius.
The Volume of hemisphere of base radius r is equal to
The inner radius of the tank r = 1m
Thickness of iron = 1cm = 1/100 m =0.01m
Outer radius of the tank, R = 1m + 0.01m = 1.01m
The volume of the iron used to make the tank can be calculated by subtracting the volume of the tank with inner radius from the volume of the tank with outer radius.
Volume of the iron used to make the tank 
0.06348 m3 of iron used to make the tank
0.06348 m3 of iron used to make the tank
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