The volume of sand was obtained by multiplying the length of the world's beaches by their average width and depth. The number they calculated was seven quintillion five quadrillion (that's 7.5 followed by seventeen zeros or 7.5 billion billion) sand grains! Next, consider how many stars fill the Universe.
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Answer:
The volume of sand was obtained by multiplying the length of the world's beaches by their average width and depth. The number they calculated was seven quintillion five quadrillion (that's 7.5 followed by seventeen zeros or 7.5 billion billion) sand grains! Next, consider how many stars fill the Universe.