The length of minute hand of a clock is 5.4 cm. What is the area covered by this in 5 minutes
Answers
A) 15.27
B) 16.27
C) 17.27
D) 7.27
E) 7.63
area of circle is pi*r^2   but in 5 minutes area covered is  (5/60)*360= 
<gadget id="calculator"> (5/60)*360</gadget>
<output>30</output>
30 degree   so formula is pi*r^2*(angle/360)=3.14*(5.4^2)*(30/360)=7.63 cm^2   ANSW7.63R:7.63
<result>E</result>
The length of minute hand of a clock is 5.4 cm. What is the area covered by this in 5 minutes