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Quantitative Aptitude-Tricks & Solutions-Time & Work

# Quantitative Aptitude-Tricks & Solutions-Time & Work

Dear Readers, Topic Wise Aptitude questions for Competitive Exam was given here.Aspirants those who are preparing for the examination can use this.

Quantitative Aptitude-Topic Wise Questions-Time & Work – Set -2

1)The time taken by A alone to finish a piece of work is 60 % more than that taken by A & B together to finish the same piece of work . C is twice as efficient as B . If B & C together can complete the same piece of work in 40/3 days, in how many days can A alone finish the same piece of work ?
A)32
B)24
C)16
D)28
2)8 children & 10 men complete a certain piece of work in 29 days . If each child takes twice the time taken by a man to finish the work, then in how many days will 15 men & 86 boys finish the same work ?
A)9 days
B)7 days
C)12 days
D)10 days
E)None of these
3)Abhishek is twice as good a workman as Bharat and Bharat is twice as good a workman as Charu. If Abhishek & Bharat can together finish a piece of work in 4 days, then Charu can do it in .
A)6
B)8
C)24
D)12
E)14
4)8 men & 4 women together can complete a piece of work in 6 days. work done by a man in one days is double the work done by women in one day. If 8 men & 4 women started working & after 2 days, 4 men left & 4 new women joined. In how many more days will the work be completed ?
A)5
B)8
C)6
D)4
E)9
5)The ratio of work done by 20 men to work done by 30 women in same time is 8 :5.if 10 men and 18 women can do a work in 12 days, how many men would be required to finish it in 14 days
A)10
B)12
C)14
D)15
E)18
6)A & B together can complete a job in 8 days , B & C when each work alone can finish work in 12 days, A & B work for 4 days then A leaves , B continues for 2 more days and then he leaves too. C now starts working and finish the job. How many days did C require ?
A)5
B)6
C)3
D)4
E)7
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Ans
1.B-24)
Ratio of efficiency = A : (A+B)=100 :160=5:8
Ratio of efficiency of A:B=5:3
Ratio of efficiency of A:B:C=5:3:6(as C is twice as efficiency as B)
Total efficiency of B & C is =9
According to questions
9 →40/3
So 5- (40/3 *9)/5= 24 days

2-B-7 )
2 children = 1 man
8 children + 10 men =14 men
15 men + 86 boys= 58 men
58 men finish the work in (14*29)/58=7 days

3.24)
Ratio of efficiency of Abhishek :Bharat =2:1
Ratio of efficiency of Bharat : Charu =2:1
Ratio of efficiency of Abhishek :Bharat :Charu=4:2:1
Total efficiency of Abhishek & Bharat is = 6
According to question
6→4
1= (6*4)/1=24 days

4.A-5)
1 M=2 W
8M+4W=20W
4M+8W=16W
Let In X more days, the work will be completed.
According to questions
20 *6=(20*2)+16*X
X=5 days

5-D-15)
(20 *5)M=(30 *8)W
5M=12W
10M+18W=42W
According to question
Women would be required to finish it in 14 days
=(42*12)/14=36W=15M
So men would be required=15 M

6.D)
A alone can finish the work in 24 days
According to question
4/24 +6/12+X/12=1
X=4 days
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