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Syllabus

1) A play - top is in the form of a hemisphere surmounted on a cone . the diameter of the hemisphere is 3.6cm. the total height of the play-top is 4.2cm. find its total surface .

a square field of area 31684metre square to be enclosed with wire placed at height 1,2,3 4 metre above the ground respectively.what length of wire will be reqd if the length reqd for each circuit 5% more than perimeter of the field?