When viewed through a certain microscope objects appear 120 times larger. If a red blood cell appears to have a radius of 49.2 centimeters, what is the actual diameter, in millimeters of the cell? (1 millimeter = 0.1 centimeter)  Answers.
A) 0.82	B) 4.1	C) 8.2	D) 11.8	E) 82
0.1 Centimetre = 1 millimetre   1 cm = 10 mm   49.2 cm = 49.2 * 10= 
<gadget id="calculator">49.2 * 10</gadget>
<output>492</output>
492 mm   Objects are magnified by factor of 120.   Original radius= 492/120= 
<gadget id="calculator">492/120</gadget>
<output>41/10 = around 4.1</output>
~4.1   Diameter= 4.1 * 2= 
<gadget id="calculator">4.1 * 2</gadget>
<output>8.2</output>
8.2   Ans 8.2.
<result>C</result>
When viewed through a certain microscope objects appear 120 times larger. If a red blood cell appears to have a radius of 49.2 centimeters, what is the actual diameter, in millimeters of the cell? (1 millimeter = 0.1 centimeter)