Question

There is enough food for 15 days for 20 persons in a residential school. How long does it last for 30 persons?

Answer 1

Dear Student,

◆ Answer -

10 days

● Explaination -

Given that food will last for 15 days for 20 persons.

No of days food will last for 30 persons is given by -

No of days = 15 × 20 / 30

No of days = 10 days

Therefore, given quantity of food will last for 10 days to 30 persons.

Thanks dear. Hope this helps you..

Answer 2

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GIVEN

There is enough food for 15 days for 20 persons in a residential school

TO DETERMINE

The number of days the food last for 30 persons

CALCULATION

SOLVE USING RULE OF THREE

$\sf{PERSONS \: \: \: \: \: \: \: \: \: \: \: \: \: \: \ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: DAYS \: }$

$\sf{ \: \: \: \: \: \: \: 20 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 15\: }$

$\sf{ \: \: \: \: \: \: \: 30 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: ? \: }$

Here the amount of food is constant

So as the number of persons increase the number of days decrease

Hence the required number of days

$= \displaystyle \sf{15 \times \frac{20}{30} \: }$

$= \displaystyle \sf{10 \: }$

Hence The number of days the food last for 30 persons is 10 days

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