4. The volume of a cylinder of height 4 cm is
196 pie cm^3. Find its lateral surface area and its
total surface area.
Answers
Answered by
1
Answer:
Step-by-step explanation:
volume of cylinder =196π cm³
πr² h=196π cm³
⇒ r²h=196 cm³
⇒ r² (4 cm)=196 cm³ [given, height=4 cm]
⇒ r² =196 cm³/4 cm
⇒ r²=49 cm²
⇒ r=√49 cm²
⇒ r=7 cm
lateral or curved surface area = 2πr h
=2×(22/7) ×7×4
= 176 cm²
total surface area =2πr(h+r)
= 2 ×(22/7 ) ×7(4+7)
=44(11)
= 484 cm²
Similar questions