Time and Work

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If 12 men and 15 boys can do a piece of work in 10 days. Then in how many days can 15 men and 25 boys do thrice of this work , it being given that 3 men can do as much work in 2 hours as 5 boys can do in 3 hours.
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A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

150
238
27
22
2 comments25 answers
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A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

150
123
432
300
1 comment10 answers
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A team of 80 men is supposed to do a work in 64 days. After 36 days, 20 more men were employed and the work finished 2 days earlier. How many days would it have been delayed if 20 more men were not employed?

4.25
4.5
6
5.25
3.33
THINK TWICE BEFORE YOU LEAP
5 comments60 answers
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A team of 80 men is supposed to do a work in 64 days. After 36 days, 20 more men were employed and the work finished 2 days earlier. How many days would it have been delayed if 20 more men were not employed?

4.25
4.5
6
5.25
3.33
THINK TWICE BEFORE YOU LEAP
3 comments46 answers
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A team of 80 men is supposed to do a work in 64 days. After 36 days, 20 more men were employed and the work finished 2 days earlier. How many days would it have been delayed if 20 more men were not employed?

THINK TWICE BEFORE YOU LEAP
2 comments
deepdeepika777
@deepdeepika777  ·  0 karma

????

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sidharth.y2k
@sidharth.y2k  ·  0 karma

total number of man days = 80*64= 5120. 

From given condition total number of man days =  (36*46+26*100)= 5480 man days

additional number of man days = (5480-5120) = 360

so M*D= 360

80*d= 360

D = 4.5.

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three man A,B,C working together can do a job in 6 hrs less time than A alone, in 1 hr less time than B alone and in half the time needed by C when working alone. Then A and B together can do the job in

2/3 hr
3/4 hr
3/2 hr
4/3 hr
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Six small pumps and three large pumps are fitted to a tank. Each small pumps works 2/3rd the rate of each large pump. If all the pumps work together what fraction of the time taken by a single large pump, will they take to fill the tank? 

1 comment
ajd1793
@ajd1793  ·  0 karma

3/7

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I have been doing Time and Work. There, I am finding calculations involving fractions. How can I easily solve them ?

For example, how will you calculate 3.33/8.33?

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antrikshnigam1
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johnsmith123
@johnsmith123  ·  8 karma

ok

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3 men and 4 boys can earn rs 765 in 7 days. 11 men and 13 boys can earn rs 3008 in 8 days. in what time will 7 men and 9 boys earn rs 2480?

2 comments
blackburn268
@blackburn268  ·  0 karma

10days ??

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askankita91
@askankita91  ·  15 karma

for 8men and 9 boys , they take 9.3 days ? . . but the question asks about 7men and 9 boys ..  😞 😞

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