MEDIUM
8th West Bengal Board
IMPORTANT
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The work for construction of the village road will be started. It has been decided that 14 people will work 4 hours daily for 15 days to complete the total work. Let's workout using the Rule of three method how many days it will take to complete the work by 24 people working 7 hours daily.

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Important Questions on Rule of Three

MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 2
In a book of 105 pages written by Subhash uncle, there are in average 25 lines in each page and there are in average 8 words in each line. Let's work out using the method of the Rule of Three how many pages will be there in the book if there are 30 lines in each page having 10 words in each line.
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 3
540 Bighas of land of an agricultural farm are to be cultivated in 14 days. 120 Bighas of land was cultivated in first 4 days by 5 tractors of equal strength. Let's work out using the method of the Rule of Three how many tractors will be required to complete the cultivation in time.
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 4
30 heads of people repair 37 part of a road of a village in 15 days. How many days it will take to repair the rest of the road if additional 10 heads of people join?
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 5
A pump of 5 HP can lift 36000 litres of water in 8 hours. How many hours it will take to lift 63000 litres of water by a 7 HP pump?
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 6
There are two motors of 5 Hp and 3 Hp in a factory. The 5 Hp motor requires 20 units of electricity in 8 hours. How many units of electricity will be required if the 3 Hp motor works for 10 hours?
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 7
In a loom at Gopalnagar 14 weavers can weave 210 sarees in 12 days. The workshop got an order to supply 300 sarees within 10 days during the Pujas. How many extra weavers have to be employed to complete the work in time?
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 8
A Company has got the work of unloading goods from a ship in 10 days. 280 heads of people have been employed for this purpose After 3 days it is seen that 14th of the work has been completed. Let's work out using the method of the Rule of Three how many heads of people are to be engaged to complete the work in time.
MEDIUM
8th West Bengal Board
IMPORTANT
Ganitprabha (MATHEMATICS TEXT BOOK) Class 8>Chapter 10 - Rule of Three>Let's work out 10.2>Q 9
A Power-loom is 214 times more powerful than a hand-loom. 12 hand-looms weave 1080 meters length of cloth in 18 days. How many power-looms will be required to weave 2700 meters length of cloth in 15 days?