Aptitude - Chain Rule - Discussion
Discussion Forum : Chain Rule - General Questions (Q.No. 9)
9.
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:
Answer: Option
Explanation:
Let the required number of revolutions made by larger wheel be x.
Then, More cogs, Less revolutions (Indirect Proportion)
14 : 6 :: 21 : x 
14 x x = 6 x 21
 x = |
6 x 21 |
| 14 |
x = 9.
Discussion:
13 comments Page 2 of 2.
Rahul said:
1 decade ago
Cogs = Tooth on the rim of gear wheel...
If cogs increases , wheel circumference increases then revolution decreases dats means
6 cogs,less circumference,more revolution..
14 cogs, more circumference ,less revolution compared to 6 cogs wheel
cogs is inversely proportional to revolutions
6 cogs gives 21 revolution
1 cog will give =6*21 revolutions.
14 cog will give = 6*21/14=9
If cogs increases , wheel circumference increases then revolution decreases dats means
6 cogs,less circumference,more revolution..
14 cogs, more circumference ,less revolution compared to 6 cogs wheel
cogs is inversely proportional to revolutions
6 cogs gives 21 revolution
1 cog will give =6*21 revolutions.
14 cog will give = 6*21/14=9
Avaneet said:
1 decade ago
What is cogs?
Prakash said:
1 decade ago
Please explain another method for this problem.
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