Thirty men take 20 days to complete a job working 9 hours a
day. How many hour a day should 40 men work to complete the job?
(a) 8 hrs
(b) 7 1/2 hrs
(c) 7 hrs
(d) 9 hrs
Answer Posted / jyosna
30 * 20 * 9 = 5400 man-hours required to complete the job
:
Let x = no. hrs a day to do the same job (assuming in 20 days)
40 * 20 * x = 5400
800x = 5400
x = 5400%2F800
x = 6.75 hrs a day for 20 days to do the same job
SO THE ANSWER IS 7HRS(approx)
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Find the next series: AA AB BC CE ?
Lucia is a wonderful grandmother and her age is between 50 and 70. Each of her sons have as many sons as they have brothers. Their combined ages give Lucia's present age.what is the age?
There is a 4 inch cube painted on all sides. This is cut down into of 1 inch cubes. What is the no of cubes which have no pointed sides.
The difference b/w the compound interest payble half yearly and the simple interest on a certain sum lent out at 10% p.a for 1 year is Rs 25. What is the sum?
15 tennis players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?
There are 19 horses in a stable. All but eight died. How many will be left in the stable?
Conversation between two mathematicians: first : I have three children. The product of their ages is 36 .. If you sum their ages . it is exactly same as my neighbour's door number on my left. The second mathematician verifies the door number and says that the not sufficient . Then the first says " o.k one more clue is that my youngest is the youngest" Immediately the second mathematician answers . Can you answer the question asked by the first mathematician? What are the children ages?
15 men take 21 days of 8 hrs. each to do a piece of work. How many days of 6 hrs. each would it take for 21 women if 3 women do as much work as 2 men?
A batsman scored 120 runs including 16 fours and 2 sixes. What percentage of his total score did he make by running between the wickets?
they asked the temperature problem.it was same as previous papers.the ratio was -t*t/6+4t+12.
‘a‘ number of persons work daily ‘b’ hours to produce ‘c’ items. If ‘d’ persons walks away from the group what will be the number of hours to produce ‘c’ items. ?
Find the value of ( 0.75 * 0.75 * 0.75 - 0.001 ) / ( 0.75 * 0.75 - 0.075 + 0.01)?
Four friends are given named Akansha, Anuska, Anisha, ... , ... Each of them live in a separate home and sleep on one bed. Akansha and Anuska have two extra beds, two of the house have green lawns while the rest have narrow porchs, One of the house has Airconditioner while the rest have fans
How is the father of the man ,who is the brother of the only aunt of my brother related to me?
There are three types of tickets available for a concert: orchestra , which cost $12 each; balcony, which cost$9 each: and box, which cost $25 each. There were P orchestra tickets , B balcony tickets, and R box tickets sold for the concert. Which of the following expressions gives the percentage of ticket proceeds due to the sale of orchestra tickets?