Question

Answer the question asked below​

Answer 1

Answer:

There is a mistake in this question. The slant height of the cone should be 8 m instead of 8 cm.

Curved surface area of cone = πrl

= 22/7*2.5*8

= 440/7

= 62.86 sq m

Curved surface area of cylinder = 2πrh

= 2*22/7*2.5*21

= 330 sq m

Area of the base circle of the cylinder = πr²

= 22/7*2.5*2.5

= 19.64 sq m

Total surface area of rocket = 62.85 + 330 + 19.64

= 412.5 sq m

Volume of cylinder = πr²h

= 22/7*2.5*2.5*21

= 412.5 cu m

Now 

h² = 8² - (2.5)²

h² = 64 - 6.25

h² = 57.75

h = √57.75

h = 7.6 m

Volume of the cone = 1/3πr²h

= 1/3*22/7*2.5*2.5*7.6

= 49.76 cu m

Total volume of rocket = 412.5 + 49.76

= 462.26 cu m

hope it helps..

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