Question

in a house of 15 persons food was sufficient for 30 days. 5 persons left the house. For how many days the food would be sufficient? ​

Answer 1

Given,

There is sufficient food for 15 persons for 5 days.

To find,

The number of days for that the food would be sufficient if 5 persons left the house.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Now, here we have to apply normal arithmetic method.

New person number = 15-5 = 10

For 15 persons = 30 days

For 1 person = 15×30= 450 days

For 10 persons = 450/10 = 45 days

Hence, the food will be sufficient for 45 days.

Answer 2

SOLUTION

GIVEN

• In a house of 15 persons food was sufficient for 30 days.

• 5 persons left the house.

TO DETERMINE

The number of days the food would be sufficient

EVALUATION

Here it is given that In a house of 15 persons food was sufficient for 30 days.

5 persons left the house

So the number of persons now = ( 15 - 5 ) = 10

SOLVE USING RULES OF THREE

$\sf{ : \: \: \: \: Number \: of \: persons \: \: \: \: \: \: \: \: \: \: \: Number \: of \: days }$

$\sf{ : \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 15 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 30}$

$\sf{ : \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 10 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:? }$

Here the number of persons and number of days are in inverse proportion

Since the number of persons decreases, so the number of days will increases

So the required number of days

$\displaystyle \sf{ = 30 \times \frac{15}{10} }$

$\displaystyle \sf{ = 45 }$

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

1. If the carriage of 810 kg, for 70km cost Rs.45, what will be the cost of 840kg for a distance of 63 km at the half of the former rate

https://brainly.in/question/12636102

2. A scooter is travelling at uniform speed of 80 km/hr. How much distance it will cover in 24 min.?

https://brainly.in/question/31137065