 Home
 Quantitative
 English
 Reasoning
 IT Officer
 Programming

Computer
 Computer Awareness Questions Answers  Set 1
 Computer Awareness Questions Answers  Set 2
 Important Abbreviations Computer Awareness Questions Answers
 Important File Extensions Questions Answers
 Computer System Architecture Questions Answers
 MS Office Questions Answers
 MS Excel Questions Answers
 MS PowerPoint Questions Answers

GK
 Geography Questions Answers
 Indian History Questions Answers
 World History Questions Answers
 Indian Economy Questions Answers
 Indian Polity and Constitution
 Physics Questions Answers
 Chemistry Questions Answers
 Biology Questions Answers
 First In India
 First In World
 Longest and Largest
 Books and Authors
 Important Days of year
 Countries and Capitals
 Invenstions and Inventors
 Current Affairs
 Govt Jobs
 You are here
 Home
 Quantitative Aptitude
 Arithmetic Aptitude Questions Answers
 Chain Rule Questions Answers
 Aptitude Question
Important English Words
 Boast
 Lofty
 Enjoin
 Procurement
 Brisk
Means: Show Off
Means: Of Imposing Height
Means: Give Instructions To Or Direct Somebody To Do Something With Authority
Means: Obtainment, Acquirement
Means: Active, Fast, Energetic
Question Detail
A flagstaff 17.5 metre high casts a shadow of length 40.25 metre. The height of building, which casts a shadow of length 28.75 metre under similar conditions will be :
 12 metre
 12.5 metre
 13.5 metre
 14 metre
Answer: Option B
Explanation:
Less shadow, Less Height (Direct Proportion)
So, let height of building be x metre
then,
\begin{aligned}
40.25 : 17.5 :: 28.75 : x \\
=> x = \frac{17.5*28.75}{40.25} \\
=> x = 12.5
\end{aligned}
So height of building should be 12.5 metre
1. 4 matweavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat weavers in 8 days ?
 12
 14
 16
 18
Answer: Option C
Explanation:
Please always remember, that what exactly we need to calculate before applying chain formula. As in this question we need to find how many mats, RIGHT !
So we will compare everything with "number of mats"
As,
More men, More number of mats (Direct Proportion)
More days, More number of mats (Direct Proportion)
So, it can be solved as,
\begin{aligned}
\begin{bmatrix}Weavers & 4 & 8 \\Days & 4 & 8 \end{bmatrix} :: 4 : x \\
=> x*4*4 = 8*8*4 \\
=> x = 16
\end{aligned}
2. An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metre of cloth ?
 194 seconds
 195 seconds
 196 seconds
 197 seconds
Answer: Option B
Explanation:
Let the time required by x seconds.
Then, More cloth means More time (Direct Proportion)
So,
\begin{aligned}
0.128 : 1 :: 25 : x
=> x = \frac{25*1}{0.128} \\
=> x = 195.31
\end{aligned}
So time will be approx 195 seconds
3. 36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work ?
 24 days
 28 days
 34 days
 35 days
Answer: Option A
Explanation:
Less Men, means more Days {Indirect Proportion}
Let the number of days be x
then,
27 : 36 :: 18 : x
[Please pay attention, we have written 27 : 36 rather than 36 : 27, in indirect proportion, if you get it then chain rule is clear to you :)]
\begin{aligned}
x = \frac{36*18}{27} \\
x = 24
\end{aligned}
So 24 days will be required to get work done by 27 men.
4. 10 men, working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the work in 12 days ?
 4 hours a day
 5 hours a day
 6 hours a day
 7 hours a day
Answer: Option C
Explanation:
More Men, Less Hours {Indirect Proportion}
Less Days, More Hours {Indirect Proportion}
\begin{aligned}
\begin{bmatrix}Men & 15 & 10 \\Days & 12 & 18 \end{bmatrix} :: 6 : x \\
=> x * 15 * 12 = 10 * 18 * 6 \\
=> x = \frac{10*18*6}{15*12} \\
=> x = 6
\end{aligned}
5. If 16 toys cost 240, then what do 40 toys cost ?
 Rs. 600
 Rs. 620
 Rs. 640
 Rs. 660
Answer: Option C
Explanation:
Although we can first calculate the cost of one toy and then can multiply it with 40 to get the result.
but we will solve it with chain rule so that we can prepare ourself for other complex problems which we can solve easily by applying this rule.
Let the required cost be Rs. x
More toys means More Cost. (Direct Proportion)
\begin{aligned}
15:40 :: 240:x \\
=> x = \frac{240*40}{15} \\
=> x = 640
\end{aligned}
So 40 toys will cost Rs 640
 Copyright 2014  All rights reserved
 Terms Of Use & Privacy Policy
 Copyright
 Contact Us