If 12 men and 16 boys can do a piece of work in 5 days and,13 men and 24 boys can do it in 4 days, how long will 7 men and 10 boys take to do it,
Answers were Sorted based on User's Feedback
Answer / sapan anand
12m + 16b = 1 /5 days
13m + 24b = 1/4 days
5( 12m +16b) = 4( 13m + 24b)
1m = 2b
12m + 16b = 5 days
12m + 8m = 5 days
20m = 5 days
7m + 10b = 7m + 5m = 12m
1m = 5 x 20
12m = 5 x 20 / 12 = 8 1/3 days
Is This Answer Correct ? | 11 Yes | 5 No |
according to questions 12men =16boys # 5 ......eq(1) and 13men + 16boys # 4days .........eq(2) from equation 1 we get60men + 80boys # 1 days......eq(3) and from equation 2 we get 52men + 96 boys # 1day......eq(4) from equation 3 & 4 we can calculate that when 8 men reduced there is extra 16 boys required to finish the same job in same time, therefore efficiency of 1 man + 2 boys. putting this efficiency in equation 3 we get 60 men + 40 men (=80boys) # 1 day or 100men # 1day or 1man can do work 1/100 parts of job per day. and 1 boy can do work 1/200 parts 0f job per day. therefore 7men+10boys can do work 7/100+10/200=24/200 parts of job per day and to finish they need 200/24 days that is 8.3 days
Is This Answer Correct ? | 2 Yes | 5 No |
Hello sir, I am Ravindra singh from delhi & I m 25 year old, I have 5 years work experience in sales coordination and my education qualification is B Com, I want to know what should I do after B Com MBA in sales and marketing or supply chain management Or PGDCA , Please suggest me, Thanks Regards Ravindra singh
salary is 's' per month,'x'% of salary is given as bonus, if 3 months salary is s1,s2 & s3 then what is his salary.
A and b can do a piece of work in 15 and 10 days. A and b work on it for sometime and then a leaves b completes the job in 5 days. For how long did a work.
the total expense of boarding house are partly fixed and partly variable.the charge is rs 70 per head when there are 25 boarders and rs 60 when there are 50 boarders.find charge per head when there are 100 boarders
On Monday a banker processed a batch of cheques, on Tuesday she processed three times as many, and on Wednesday she processed 4000 cheques. In the three days, she processed 16000 cheques. How many did she process on Tuesday?
f(X)= 2X-1 + f(X-1) if X is not equal to zeroandiff(X=0)=0, If f(f(X))=81 then the value of X=?
A dishonest hairdresser uses a mixture having 5 parts after-shave lotion and 3 parts water. After taking out some portion of the mixture, he adds equal amount of water to the remaining portion of mixture such that the amount of after shave lotion and water become equal. Find the part of mixture taken out.
debentures book building
a campus radio station surveyed 190 students to determine the type of music they liked.it revealed that 114 like rock,50 liked jazz,41 liked classical music.14 liked rock and jazz,15 liked rock and classical,11 liked classical and jazz,5 liked all types of music.draw venn diagram n explain how many a) like rock only b)like jazz but not rock? c)like classical or jazz but not rock? d)like classical and jazz but not rock? e)like exactly one of the 3 types of music? f)do not like any of the three types of music? g)like at least 2 of the three types of music? h)do not like either rock or jazz?
A company installed 36 punching machines at the beginning of the year.In the spring they installed 9 additional m/c's and then discontinued 18 in the fall.How many were still installed at the end of the year?
Q) A store owner decided to raise the price of a particular item by exactly 10%. Of the following which is NOT the new price? a) $1.10 b) $8.80 c) $11.00 d) $57.30 e) $78.10
1.Fresh Grapes contain 90% water by wt. Dried grapes contain 20% water by %age. What will b wt of dried grapes when we begin with 20 kg fresh grapes? a)2kg b) 2.4kg c) 2.5kg d) none Answer. C 2.How many 5 digit no. can b formed wit digits 1, 2, 3,4,5,6 which r divisible by 4 and digits not repeated a)144 b)168 c)192 d) none Answer. C 3.There is a rectangular Garden whose length and width are 60m X 20m.There is a walkway of uniform width around garden. Area of walkway is 516m^2. Find width of walkway a)1 b)2 c)3 d)4 Answer. C 4.If 1= (3/4)(1+ (y/x) ) then i. x=3y ii. x=y/3 iii. x=(2/3)y iv. none Answer. A 5. The sum of six consecutive odd nos. is 888. What is the average of the nos.? i. 147 ii. 148 iii. 149 iv. 146 Answer. B 6. if x-y + z = 19 , y + z =20 , x-z=3 , find d value of x+4y-5z a)22 b)38 c)17 d) none 7. Find approx value of 39.987/0.8102+1.987*18.02 a)72 b)56 c)86 d)44 Answer. C 8. Asish was given Rs. 158 in denominations of Rs 1 each. He distributes these in diff bags, such that ne sum of money of denomination betn 1 and 158 can be given in bags. The min no. of such bags reqd a)10 b)17 c)15 d) none Answer. D