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
If A=Z, B=Y, C=X, .......... Z=A, Then GROUP = ?
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 ?
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
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.
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?
02: 1/3 of girls , 1/2 of boys go to canteen .What factor and total number of classmates go to canteen?
In a mixture R is two parts, S is one part . In order to mixture how much R is to be added.
In a party there are women and cats.There are 18 heads and 72 legs altogether. How many women and cats?
A&B fill 3 litres and 5 litres of oil in the car. C pays Rs. 8/- to A7B. How much will A get?
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?
There are 5 red shoes, 4 green shoes. If one draw randomly a shoe what is the probability of getting red shoe
A clock showing 6 o'clock takes 30 secs to strike 6 times.How long will it take to strike 12 at midnight?
Integral ET(epsiolan transpose)*sigma*dV P=strain displacement vector Q=stress-strain deformation Find [K]
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?
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.