Find the surface area of the figure below in hectares.

                                                

A: 351 ha

B: 100.57 ha

C: 0.351 ha

D: 0.000351 ha

Correct Answer : D

Surface area of a cylinder=area of two circles+Area of curved surface

Surface area of a cylinder=2(πr²)+πdh

=2×22/7×4×4+22/7×8×10

=100.57+251.43

=351 cm²

1 ha=1000 000 cm²

?       =351cm²

=0.000351 ha.

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