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<span>Diameter of a grain of sand = 2 x 10^{-4}
</span><span>Diameter of the average cell in the human body = 1 x 10^{-5}
</span>
Difference of diameter of grain of sand and cell of human body
= 2 x 10^{-4} - 1 x 10^{-5}
=
=
=
=
=
= 19 × 10^{-5}
Hence, the diameter of a grain of sand is 19 × 10^{-5} longer than the diameter of the average cell of the human body.
</span><span>Diameter of the average cell in the human body = 1 x 10^{-5}
</span>
Difference of diameter of grain of sand and cell of human body
= 2 x 10^{-4} - 1 x 10^{-5}
=
=
=
=
=
= 19 × 10^{-5}
Hence, the diameter of a grain of sand is 19 × 10^{-5} longer than the diameter of the average cell of the human body.