If 20 men can build a wall 56 meters long in 6 days , what length of a similar w

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Aptitude ‣ Chain Rule Comments

Question
If 20 men can build a wall 56 meters long in 6 days , what length of a similar wall can be built by 35 men in 3 days?
Options
A. 46
B. 47
C. 48
D. 49

Correct Answer

49

Explanation

Let the required length be x meters

More men, More length built (Direct proportion)

Less days, Less length built (Direct Proportion)

$\begin{array}{r} \begin{matrix} M e n & 20 : 35 \end{matrix} \\ \begin{matrix} D a y s & 6 : 3 \end{matrix} \end{array}\} ? ? 56 : x$

=> (20 x 6 x X)=(35 x 3 x 56)

=> x = 49

Hence, the required length is 49 m.

Chain Rule problems

Search Results

1. Mishti's birthday is on Thursday 27th April. On what day of the week will be Aradhya's Birthday in the same year, if Aradhya was born on 20th October?
Options
A. Friday
B. Wednesday
C. Saturday
D. Thursday

6. A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?
Options
A. 75
B. 82
C. 100
D. 110

7. If 36 men can do a piece of work in 25 hours, in how mwny hours will15 men do it?
Options
A. 40
B. 50
C. 60
D. 70

8. 2 men and 7 boys can do a piece of work in 14 days; 3 men and 8 boys can do the same in 11 days. Then, 8 men and 6 boys can do three times the amount of this work in
Options
A. 18 days
B. 21 days
C. 24 days
D. 30 days

9. If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
Options
A. 1
B. 3
C. 7
D. 14

10. A contractor undertakes to do a piece of work in 40 days. He engages 100 men at the begining and 100 more after 35 days and completes the work in stipulated time. If he had not engaged the additional men, how many days behind schedule would it be finished?
Options
A. 3
B. 5
C. 6
D. 9

Comments

More in Aptitude: