If 4 men or 6 women can do a piece of work in 12 days working 7 hours a day, How many days will it take to complete a work twice as large with 10 men and 3 women working together 8 hours a days?
a) 5 b) 6 c) 10 d) 7 e) None of these
Answers and Explanations are welcome in comments
The Correct Answer will be Given Tomorrow
D ?
ReplyDeleteCorrect Answer is 7
DeleteExplanation : 4 men or 6 women are doing work in 12 Days working 7 hours a day.
This means working efficiency of 4 men and 6 women is equal
4 men = 6 women
1 man = 6/4 women (3/2 women)
Now we have to calculate the work done by 10 men and 3 women. Now we can change 10 men to women.
If 1 man = 3/2 women then 10 men = 15 women
So we have to calculate in how many days 18 women(15+3) can do the double work
Do the simple formula
(m1xd1xh1)/w1 = (m2xd2xh2)/w2
(6*12*7)/1 = (18*x*8)/2
Just Calculate this and you will find the value of x = 7