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How much cloth material will be required...


How much cloth material will be required to cover 1 big central dome of radius 4.5 meters ? (Take `pi = (22)/(7))`

A

`127.28 m ^(2)`

B

`172.17 m ^(2)`

C

`170.17 m ^(2)`

D

`120.17 m ^(2)`

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Knowledge Check

  • Mathematics teacher of a school took her 10th standard students to show Red fort. It was a part of their Educational trip. The teacher had interest in history as well. She narrated the facts of Red fort to students. Then the teacher said in this monument one can find combination of solid figures. There are 2 pillars which are cylindrical in shape. Also 2 domes at the corners which are hemispherical.7 smaller domes at the centre. Flag hoisting ceremony on Independence Day takes place near these domes. How much cloth material will be required to cover 2 big domes each of radius 2.5 metres?

    A
    `75 m^2`
    B
    `78.57 cm^2`
    C
    `87.47 m^2`
    D
    `25.8 m62`

  • How much cloth 2.5 m wide will be required to make a conical tent having base radius 7 m and height 24 m ?

    A
    120 m
    B
    180 m
    C
    220 m
    D
    550 m

  • What is the circumference of a circular disc of radius 14cm ? (Take pi=(22)/(7))

    A
    90cm
    B
    86cm
    C
    92cm
    D
    88cm

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