If 6 spiders make 3 webs in 7 days, then how many days are needed for 1 spider to make 1 web?	Choose the correct choice from the following answers.
A) 10  B) 12  C) 14  D) 15  E) 16
Explanation:   Let, 1 spider make 1 web in x days.   More spiders, Less days (Indirect proportion)   More webs, more days (Direct proportion)   Hence we can write as   (spiders)6:1   (webs) 1:7}::x:3   â‡’6Ã—1Ã—7=1Ã—3 Ã— x   â‡’x=14   Answer: Option 14
<result>C</result>
If 6 spiders make 3 webs in 7 days, then how many days are needed for 1 spider to make 1 web?