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 / suratnarayan tripathi

30*20*9=40*20*x
600*9=800*x
5400=800*x
x=5400/800
x=54/8
x=27/4 Hours
x=6.75 hours

It means
x=7 hour and 15 minutes

Is This Answer Correct ?    30 Yes 19 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

If A=Z, B=Y, C=X, .......... Z=A, Then GROUP = ?

673


Jack and Jill went up and down a hill. They started from the bottom and Jack met Jill again 20 miles from the top while returning. Jack completed the race 1 min a head of Jill. If the hill is 440 miles high and their speed while down journey is 1.5 times the up journey. How long it took for the Jack to complete the race ?

1089


one man or two women or three boys can do a work in 44 days then one man, one women and one boy together can fininsh the same work in ---- days

729


During a given week A programmer spends 1/4 of his time preparing flow chart, 3/8 of his time coding and the rest of the time in debugging the programs. If he works 48 hours during the week , how many hours did he spend debugging the program.

811


What amount of compound interest can be obtained on an amount of Rs. 4500 at the rate of 4% p.a. at the end of 2 years?

834






02: 1/3 of girls , 1/2 of boys go to canteen .What factor and total number of classmates go to canteen?

1024


In a mixture R is two parts, S is one part . In order to mixture how much R is to be added.

898


In a party there are women and cats.There are 18 heads and 72 legs altogether. How many women and cats?

731


A&B fill 3 litres and 5 litres of oil in the car. C pays Rs. 8/- to A7B. How much will A get?

950


in a market 4 man are standing .the average age of the four before 4 years is 45, after some days one man is added and his age is 49. What is the average age of all?

931


There are 5 red shoes, 4 green shoes. If one draw randomly a shoe what is the probability of getting red shoe

877


A clock showing 6 o'clock takes 30 secs to strike 6 times.How long will it take to strike 12 at midnight?

1120


Integral ET(epsiolan transpose)*sigma*dV P=strain displacement vector Q=stress-strain deformation Find [K]

718


In a queue, a man is standing at the position 10th from the front and 15th from behind. How many persons are standing in the queue?

846


There are two glasses, one is filled with orange juice and other is filled with apple juice both in equal quantities say 50 50 ml. 50% orange juice is poured in apple juice and than the 50% mixture of orange and apple juice is poured in the glass of orange juice. Now you have to find out how much orange juice is there in apple juice glass and vice-versa.

809