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  • CDS Exam ELEMENTARY MATHEMATICS Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of ELEMENTARY MATHEMATICS Time And Work for CDS Exam student. This free online ELEMENTARY MATHEMATICS study material for CDS Exam will help students in learning and doing practice on Time And Work topic of CDS Exam ELEMENTARY MATHEMATICS. The study material on Time And Work, help CDS Exam ELEMENTARY MATHEMATICS students to learn every aspect of Time And Work and prepare themselves for exams by doing online test exercise for Time And Work, as their study progresses in class. Kidsfront provide unique pattern of learning ELEMENTARY MATHEMATICS with free online comprehensive study material and loads of CDS Exam ELEMENTARY MATHEMATICS Time And Work exercise prepared by the highly professionals team. Students can understand Time And Work concept easily and consolidate their learning by doing practice test on Time And Work regularly till they excel in ELEMENTARY MATHEMATICS Time And Work.


Time And Work
A can do a work in 5 days less than the time taken by B to do it. If both of them together take 11 1/9 days, then the time taken by B alone to do the same work ( in days ) is

a) 15
b) 20
c) 25
d) 30



Answer
Solution
Correct Answer Is : 25
Solution Is :
D , K and A can do a work in 5 , 15 and 35 days . They get an amount of Rs. 1054 for finishing the work working together . What is the share of K in that amount ?

a) Rs. 242
b) Rs. 324
c) Rs. 238
d) Rs. 245



Answer
Solution
Correct Answer Is : Rs. 238
Solution Is : D share : K share : A share = K time x A time : D time x A time : K time x D time = 15 x 35 : 5 x 35 : 5 x 15 = 21 : 7 : 3 So, K`s share = 1054/32 x 7 = Rs. 238
5 men and 2 women working together can do four times as much work per hour as amen and awomen together. The work done by a man and a women should be in the ratio

a) 1 : 2
b) 2 : 1
c) 1 :3
d) 4 :1



Answer
Solution
Correct Answer Is : 2 : 1
Solution Is : 5 men + 2 women = 4 men + 4 women 1 man = 2 women Work of 1 men Work of 1 women = 2 : 1
Two men and 3 boys can do a piece of work in 10 days while 3 men and 2 boys can do the same work in 8 days . In how many days can 2 men and 1 boy do the work ?

a) 11 days
b) 10.5 days
c) 11. days
d) 12.5 days



Answer
Solution
Correct Answer Is : 12.5 days
Solution Is :
A and B together can do a piece of work in 12 days, hike B alone can finish it in 30 days. A alone can finish the work in

a) 15
b) 18
c) 20
d) 25



Answer
Solution
Correct Answer Is : 20
Solution Is :
A and B do a job together in 12 days. A is 2 times as efficient as B .In how many days can B alone complete the work?

a) 36
b) 12
c) 18
d) 9



Answer
Solution
Correct Answer Is : 36
Solution Is :
In the afternoon, a student read 100 pages at the rate of 60 pages/h. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages/h. What was her average rate of reading, in pages per hour?

a) 48
b) 50
c) 60
d) 70



Answer
Solution
Correct Answer Is : 48
Solution Is : In afternoon 100 pages at 60 page/h
therefore time taken to read 100 pages =100/60=1.66h
similarly,in evening time taken = 100/40=2.5h
now,average rate of evening = total pages/time taken = 100+100/1.66+2.5
=200/4.16=48 pages/h
A alone can do a piece of work in 20 days and B alone in 30 days.They begin to work together. They will finish half of the work in

a) 6 days
b) 8 days
c) 9 days
d) 12 days



Answer
Solution
Correct Answer Is : 6 days
Solution Is :
P is thrice as good a workman as Q and therefore became able too finish a job in 48 days less than Q. Working together, they can do it in

a) 12 days
b) 18 days
c) 24 days
d) 30 days



Answer
Solution
Correct Answer Is : 18 days
Solution Is :
A can do a work in 20 days and B can do the same work in 30 days .In how many days can A and B together do the work?

a) 10
b) 12
c) 15
d) 16



Answer
Solution
Correct Answer Is : 12
Solution Is : Tinu taken to compelete the work by A and B together
= ab/a + b =20* 30/50 =12 days
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