Latest TCS Aptitude Question SOLUTION: 2 men and 7 boys can do a piece of work in 14days. 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????

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2 men and 7 boys can do a piece of work in 14days. 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????

Asked In TCS Ritika Shrivastava (9 years ago)

Unsolved Read Solution (11)

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Read Solution (11) :

ashima singh  (9 years ago)

(2m+7b)*14=(3m+8m)*11
2boys=1men

(8men+6boys)*x=(3men+8boys)*11
(8men+3men)*x=(3men+4men)*11
x=7days
8men and 6 boys do three times of work in 21 days...

Is this solution Helpfull? Yes (42) | No (2)  

karthikeyank  (9 years ago)

Ans is : 21 days
7 days
.
.
2A + 7B = 1 / 14
3A + 8B = 1 / 11
.
A = 1 / 77
B = 1 / 154
.
.
this gives 7 days
three times the amount of this work is=7*3=21 days...

Is this solution Helpfull? Yes (12) | No   

madhuri  (9 years ago)

2m+7b=1/14
3m+8b=1/11
by solving those we get m=1/77 and b=1/154
according to our problem
((8*1/77)+(6*1/154))*x=3
by solving we get
x=21 days.

Is this solution Helpfull? Yes (7) | No   

Kamal Kumar Vishwakarma  (9 years ago)

7 days
.
.
2A + 7B = 1 / 14
3A + 8B = 1 / 11
.
A = 1 / 77
B = 1 / 154
.
.
this gives 7 days

Is this solution Helpfull? Yes (6) | No (5)  

Devendra Marghade  (9 years ago)

38 1/2 days

Is this solution Helpfull? Yes (1) | No (1)  

akriti mishra  (9 years ago)

21 days...is answer

Is this solution Helpfull? Yes (1) | No   

Aalokanand jha  (8 years ago)

14*(2m+7b)=11*(3m+8m)
28m+98b=33m+88b
98b-88b=33m-28m
10m=5m
1men=2boys
3men+8boys=(3*2boys+8boys)
14boys
so,
8m+6b=22boys
14 boys-------------------11days
1boys 14*11
22 boys (14*11)/22
x=7days
8men and 6 boys do three times of work in 21 days...

Is this solution Helpfull? Yes (1) | No   

roja  (9 years ago)

i think 28 days

Is this solution Helpfull? Yes | No (4)  

lakhan jalodiya  (9 years ago)

16.5 it is

Is this solution Helpfull? Yes | No (2)  

narendra singh  (9 years ago)

ans 7days;
efficiency of man =77 & for boy =154;

Is this solution Helpfull? Yes | No (1)  

JItender Sehrawat  (7 years ago)

9 people do in 14 days
11 people do in 11 days
so,when we increase two people then three days decrease
14 people will do in 6 and 1/2 days (bcoz here 5 people increase so 7 and half days will decrease)

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