The diameter of a coin is 23 mm
Write down the radius of the coin.
Work out the area of the face of the coin.
The coin is 2 mm thick.
Work out the volume of the coin.
+118724 The diameter is all the way acros the coin. that is 23mm.
the radius is only half way across the coin - so how much would that be?
the area of a circle is A= pi*r2 = pi*r*r
pi is about 3.14
so you can work that out . the units will be mm2
now volume is just A*thinkness and the units will be mm3
+118724 The diameter is all the way acros the coin. that is 23mm.
the radius is only half way across the coin - so how much would that be?
the area of a circle is A= pi*r2 = pi*r*r
pi is about 3.14
so you can work that out . the units will be mm2
now volume is just A*thinkness and the units will be mm3
