
100 persons have food provision for 4 days. If 20 persons left the place, the provision will last for
A) 30 days
B) 5 days
C) 120 days
D) 40 days
Answer
480.3k+ views
Hint: We have been given the number of persons and their food provision, using this, we can find the total amount of food available. Then when 20 people leave, the food requirement would change. So, the number of days for the food to last will be given by the division of total food available with the new requirement.
Complete step-by-step answer:
It is given that for 100 persons (P), the food provision was for 4 days (n). Let the amount of food consumed per day be x.
🡪 P = 100 and n = 4
The total food available (F) will be equal to the product of total persons (P), number of days (n) and the food consumed per day (x)
Now, 20 people out of 100 left. The number of people remaining will be:
The new food requirement will be its product with food consumption per day
So, the total number of days food will last (N) will be equal to the total food available divided by the new food requirement
Substituting the values, we get:
Therefore, if 20 people leave the place, the provision will last for 5 days.
So, the correct answer is “Option B”.
Note: This is the case of inverse proportionality, we can check the answer through this as well.
When there are more people the food will last for less number of days and vice – versa. So when the people are reduced here from 100 to 80, the food should have lasted for more than 4 days.
Complete step-by-step answer:
It is given that for 100 persons (P), the food provision was for 4 days (n). Let the amount of food consumed per day be x.
🡪 P = 100 and n = 4
The total food available (F) will be equal to the product of total persons (P), number of days (n) and the food consumed per day (x)
Now, 20 people out of 100 left. The number of people remaining will be:
The new food requirement will be its product with food consumption per day
So, the total number of days food will last (N) will be equal to the total food available divided by the new food requirement
Substituting the values, we get:
Therefore, if 20 people leave the place, the provision will last for 5 days.
So, the correct answer is “Option B”.
Note: This is the case of inverse proportionality, we can check the answer through this as well.
When there are more people the food will last for less number of days and vice – versa. So when the people are reduced here from 100 to 80, the food should have lasted for more than 4 days.
Latest Vedantu courses for you
Grade 8 | CBSE | SCHOOL | English
Vedantu 8 CBSE Pro Course - (2025-26)
School Full course for CBSE students
₹42,500 per year
Recently Updated Pages
Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Write the following in Roman numerals 25819 class 7 maths CBSE

Trending doubts
How many ounces are in 500 mL class 8 maths CBSE

Summary of the poem Where the Mind is Without Fear class 8 english CBSE

Advantages and disadvantages of science

10 slogans on organ donation class 8 english CBSE

The LCM and HCF of two rational numbers are equal Then class 8 maths CBSE

In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
