The ratio of 4 seconds to 8 hours	Choose the correct option:	A) 1:80	B) 1:6000	C) 1:600	D) 1:7200	E) 1:500
1 hour =3600 sec   then 8 hours =8*3600= 
<gadget id="calculator">8*3600</gadget>
<output>28_800</output>
28800   so ,4:28800=1:7200   ANSWER:1:7200
<result>D</result>
The ratio of 4 seconds to 8 hours