Chain rule

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poornima lagadapati

Active member
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

A.9
B.10
C.11
D.12

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?

A.648
B.1800
C.2700
D.10800

39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

A.10
B.13
C.14
D.15
 
If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

A.48 paise
B.54 paise
C.56 paise
D.72 paise

A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

A.4
B.9
C.12
D.49


If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

A.1
B.
7
2
C.7
D.49
 
A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:

A.10 m
B.12.5 m
C.17.5 m
D.21.25 m
In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?

A.20
B.30
C.40
D.50


An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metres of cloth?

A.178
B.195
C.204
D.488
 
poornima lagadapati said:
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

A.9
B.10
C.11
D.12

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?

A.648
B.1800
C.2700
D.10800

39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

A.10
B.13
C.14
D.15
Click to expand...
1. D, 2. B
 
poornima lagadapati said:
If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

A.48 paise
B.54 paise
C.56 paise
D.72 paise

A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

A.4
B.9
C.12
D.49


If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

A.1
B.
7
2
C.7
D.49
Click to expand...
1. A 2. B
 
poornima lagadapati said:
A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:

A.10 m
B.12.5 m
C.17.5 m
D.21.25 m
In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?

A.20
B.30
C.40
D.50


An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metres of cloth?

A.178
B.195
C.204
D.488
Click to expand...
1. B 2. B
 
36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?

A. 12
B. 18
C. 22
D. 24
E. None of these
Option d
 
.
4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?

A. 4
B. 8
C. 12
D. 16
Option d
 
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