Which of the following gives the volume of the solid created by revolving a curve f(x) around the y-axis?

Question

 V=2Π∫ xf(x)dx

 

V=Π∫ xf(x)dx

 

 V=2Πx²f(x)dx

 

V=Π²∫ xf(x)dx

 

 

Answer 1

Using the formula for shell method

 

It should be (a)