Help me, please with this question ?

enter image source here

1 Answer
Jim G.
Feb 20, 2018

#157" square in"toB#

Explanation:

#"to obtain the surface area we require the area of the"#

#"curved surface plus the 2 circular ends of the cylinder"#

#• " area of curved surface "=2pirh#

#color(white)(xxxxxxxxxxxxxxxxxx)=2pixx2xx10.5#

#color(white)(xxxxxxxxxxxxxxxxxx)=42pi#

#"area of circular ends "=2xxpir^2#

#color(white)(xxxxxxxxxxxxxx)=2pixx4=8pi#

#"total surface area "=42pi+8pi=50pi~~157#

Related questions
Impact of this question
260 views around the world
You can reuse this answer
Creative Commons License