A conical heap is formed when a farmer pours food grains on a ground. The slant hight of heap is 350m .the circumference of the base is 132cm. what amount of tarpaulin is needed to cover the grains? farmers goes to orphanage and gives half of the food grains for the children of living there . How much grains farmer donated ? list values you learn from this act of the farmer.

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Answers

2016-03-12T21:51:47+05:30
C.S.A of a cone = (pi) x r x l
 2 x 22/7 x r = 132
                 r = 132 x 7 /2 x 22
                 r = 21cm
C.S.A of cone = 22/7 x 21 x 350
                       = 23,100 sq cm                                l^2 =h^2 + r^2
volume of a cone = 1/3 x pi x r^2 x h                      h^2= l^ -  r^2                                              = 1/3 x 22/7 x (21)^2 x 28         h^2= (350)^2 - (21)^2
                               = 12,936 cu cm
∴ the volume of the heap is 12,936 sq cm
 the farmer gives half the grains to the orphanage
∴ grains donated = 12,936 / 2
                            = 6468 cu cm

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