The ratio of 7 seconds to 5 hours
Choose one:
A) 1:80 B) 1:3600 C) 1:600 D) 1:400 E) 1:500
1 hour =3600 sec   then 7 hours =7*3600= 
<gadget id="calculator">7*3600</gadget>
<output>25_200</output>
25200   so ,7:25200=1:3600   ANSWER:1:3600
<result>B</result>
The ratio of 7 seconds to 5 hours