5. The curved surface area of a cylindrical pillar
is 528 m^2? and its volume is 2772 m^3. Find the
diameter and the height of the pillar.
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Answer:
Step-by-step explanation:
curved surface area =528 m²
2πr h =528 m² [let r,h=radius and height of cylinder]
π r h=528/2
⇒ πr h=264 ⇒A
also, volume of cylinder=2772 m³
⇒ π r² h=2772
⇒ (π r h) r=2772
⇒ (264) r= 2772
⇒ r=2772/264
⇒ r=10.5 m
using A
⇒ πr h =264
⇒ 22/7 ×10.5×h=264
⇒ 231/7×h=264
⇒ 231×h=1848
⇒ h=1848/231
⇒ h=8 m
as, radius= 10.5 m
so, diameter= 2(radius)
⇒ diameter=2(10.5)
⇒ diameter= 21 m
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