Question

the lateral surface area and the total surface area of a cylinder with base radius 7m and height 9m are respectively​

Answer 1

GIVEN:

• Height of the cylinder = 9m
• Radius of the cylinder = 7m

TO FIND:

• What is the charge curved surface area of cylinder ?
• What is the total surface area of cylinder ?

SOLUTION:

❶

We know that the formula for finding the Curved surface area of cylinder is:-

$\large{\boxed{\bf{\star \: CSA = 2 \pi r h \: \star}}}$

According to question:-

$\sf{\longmapsto CSA = 2 \times\dfrac{22}{\cancel{7}} \times \cancel{7} \times 9 }$

$\sf{\longmapsto CSA = 2 \times 22 \times 9 }$

$\bf{\longmapsto CSA = 396 \: cm^2 }$

• CSA of Cylinder = 396 cm²

❷

We know that the formula for finding the Total surface area of cylinder is:-

$\large{\boxed{\bf{\star \: TSA = 2 \pi r (h + r) \: \star}}}$

According to question:-

$\sf{\longmapsto TSA = 2 \times \dfrac{22}{\cancel{7}} \times \cancel{7} (9+7)}$

$\sf{\longmapsto TSA = 2 \times 22 \times 16}$

$\bf{\longmapsto TSA = 704 \: cm^2 }$

• TSA of cylinder = 704 cm²

______________________

Answer 2

Answer:

396 m2,704m2

Step-by-step explanation:

• जोग फॉल्स टो गिव वन इज इक्वल टू 7 मीटर हाइट इज इक्वल टू 9 सेंटीमीटर रायपुर सर्फेस एरिया एरिया फ्यूचर स्कूल 25 ऑफ हिस्ट्री 22 8227 2923