Question

FOR #GENIUS #EXPERT #VIRTUOSO #MATHS ANSWER THIS QUESTION WITH EXPLANATION​

Answer 1

Answer:

I had tried to do itbut can't done sorryyyy....

Answer 2

Question given :

The CSA of a cylinder is 2π ( y² - 7y + 12 ) and its radius is y - 3 . Find the height of the cylinder .

Required solution :

We know that CSA of a cylinder = 2πrh , So

• CSA of cylinder = 2π ( y² - 7y + 12 )

• Substitute the given values respectively

• 2π ( y - 3 ) × h = 2π ( y² - 7y + 12 )

• $\sf\:(\:y\:-\:3)h\:=\:\dfrac{2\pi(y^2\:-7y\:+12)}{2\pi}$

• Cancel out 2π

• ( y - 3 )h = ( y² - 7y + 12 )

• ( y - 3 ) h = ( y² - 3y - 4y + 12 )

• ( y - 3 ) h = y ( y - 3 ) - 4 ( y - 3 )

• ( y - 3 ) h = ( y - 3 )( y - 4 )

• $\sf\:(\:y\:-\:3)h\:=\:\dfrac{(y\:-3)(y\:-\:4)}{(y\:-\:3)}$

• y - 3 cancels out

• h = y - 4