Aptitude - Chain Rule - Discussion
Discussion Forum : Chain Rule - General Questions (Q.No. 10)
10.
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
Answer: Option
Explanation:
Let the required number days be x.
Less spiders, More days (Indirect Proportion)
Less webs, Less days (Direct Proportion)
| Spiders | 1 | : | 7 |  |
:: 7 : x |
| Webs | 7 | : | 1 |
1 x 7 x x = 7 x 1 x 7
x = 7.
Discussion:
22 comments Page 1 of 3.
Anonymous said:
5 years ago
@Radhika.
You explained it very well. Thanks.
You explained it very well. Thanks.
(1)
Pennanson said:
6 years ago
The correct Answer is 1.
(1)
Sushi said:
6 years ago
@Radhika.
Superb explanation, Thank you.
Superb explanation, Thank you.
Mayur said:
7 years ago
7 Spiders make 7 Webs in 7 Days. -> eq 1
7 Spiders make 1 Web in 1Day -> eq 2
1 Spider make 1 Web in X=? Days) -> eq3
Multiple Value of Number of Spiders with a number of days from eq 2 and eq3
7*1. = 1*X.
X. =. 7*1/1,
X. = 7 -----> Ans.
Less Spiders -> More Days (Indirect Proportion).
Less Webs -> fewer Days (Direct Proportion).
7 Spiders make 1 Web in 1Day -> eq 2
1 Spider make 1 Web in X=? Days) -> eq3
Multiple Value of Number of Spiders with a number of days from eq 2 and eq3
7*1. = 1*X.
X. =. 7*1/1,
X. = 7 -----> Ans.
Less Spiders -> More Days (Indirect Proportion).
Less Webs -> fewer Days (Direct Proportion).
Vinnu said:
7 years ago
Nice. Thanks all.
Bala said:
7 years ago
Nice explanation @Radhika.
Mayur said:
8 years ago
Good explanation @Radhika.
Siddu k said:
8 years ago
@Radhika.
Super explanation.
Super explanation.
Mr. MP said:
8 years ago
Take this example.
7 girls make 7 cakes in 7 days.
so 7 girls complete 1 cake in 1 day.
7 girls complete 2cakes in 2days.
7 girls complete 3 cakes in 3 days.
Similarly, 7 girls make 7 cakes in 7 days.
Simply can say effort of 7 girls is needed for 1 cake to complete in 1 day as good as saying effort of 1 girl is required for 7 days to make 1 cake.
7 girls make 7 cakes in 7 days.
so 7 girls complete 1 cake in 1 day.
7 girls complete 2cakes in 2days.
7 girls complete 3 cakes in 3 days.
Similarly, 7 girls make 7 cakes in 7 days.
Simply can say effort of 7 girls is needed for 1 cake to complete in 1 day as good as saying effort of 1 girl is required for 7 days to make 1 cake.
(3)
Anonymous said:
9 years ago
7spiders * 1spider * x days = 7webs * 1web * 7days.
Spiders on the Left * days = webs on the right * days.
=> 7 * 1 * x = 7 * 1 * 7.
7x = 49,
7x/7 = 49/7,
x = 7days.
Spiders on the Left * days = webs on the right * days.
=> 7 * 1 * x = 7 * 1 * 7.
7x = 49,
7x/7 = 49/7,
x = 7days.
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