a light flashes every 15 seconds, how many times will it flash in ? of an hour? Select the correct option:
A) 550 B) 600 C) 240 D) 700 E) 750
1flash=15sec   for 1 min=4flashes   so for 1 hour=4*60= 
<gadget id="calculator">4*60</gadget>
<output>240</output>
240 flashes.   ANSWER:240
<result>C</result>
a light flashes every 15 seconds, how many times will it flash in ? of an hour?