Vishwanath
Thursday, February 14, 2013
74.If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:
A. 4 days
B. 5 days
C. 6 days
D. 7 days
Answer:
Option : A
Let 1 man's 1 day's work = x and 1 boy's 1 day's work = y. |
Then, 6x + 8y = | 1 | and 26x + 48y = | 1 |
10 | 2 |
Solving these two equations, we get : x = | 1 | and y = | 1 |
100 | 200 |
(15 men + 20 boy)'s 1 day's work = |
| 15 | + | 20 |
| = | 1 |
100 | 200 | 4 |
∴ 15 men and 20 boys can do the work in 4 days. |
Title : Time And Work Q74
Description : 74.If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20...
Rating : 5
