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The radius of a solid right circular cyl...

The radius of a solid right circular cylinder is 21 cm and its height is 40 cm. What is the cost of painting the curved surface area of the cylinder at the rate of Rs. 20 per sq.cm? (Take `pi=22/7`)
एक ठोस लम्ब वृत्तीय बेलन की त्रिज्या 21 सेमी है तथा इसकी ऊंचाई 40 सेमी है | 20 रुपये प्रति वर्ग मीटर की दर से इस बेलन के वक्र पृष्ठ क्षेत्र को रंगने की लागत ज्ञात करें |

A

Rs. 108600

B

Rs. 105600

C

Rs. 26400

D

Rs. 5280

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PINNACLE-MENSURATION-EXERCISE
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  3. The radius of a solid right circular cylinder is 21 cm and its height ...

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  10. What is the area of the largest circle that can be inscribed in a squa...

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  11. What is the circumference of the largest circle that can be inscribed ...

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  16. A cuboid of size 100 cm x 80 cm x 60 cm cut into eight identical parts...

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