Question

. 100 soldiers in a fort had enough food for 20 days. After 2 days, 20 more soldiers join the fort. How long will the remaining food last?

Answer 1

Total food for 100 Soldiers is 100×20 =2000 (Let 1 soldier eats 1 Chapati a day)
In 2 days they Consumed 2 × 100 =200
Remaining Food is 1800
Now 20 New soldiers joined so total soldiers are 100+20 = 120
Now 120 Soldiers will consume 1800 food in = 1800/120 = 15 Days

Answer 2

Answer:

The remaining food will stay last for 15 days.

Step-by-step explanation:

Given,100 soldiers in a fort had enough food for 20 days.

But 2 days have gone already.

So,now food is remain for 18 days.

Now, 100 soldiers in a fort had enough food for 18 days.

So, 1 soldier can eat the same amount of food for (100×18) = 1800 days.

Now total number of soldier = (100+20) = 120.

Therefore, 120 soldier can eat the same amount of food for $\frac{1800}{120} = 15 \: days$

So,The remaining food will stay last for 15 days.

Below are some important time and work formulas for you:

Work done = time taken × rate of work

Operating speed = 1 / elapsed time

Time used = 1 / work rate

If the work is done in x number of days, then the work done in one day = 1/x

Total wok = number of days × efficiency

Efficiency and time are inversely proportional to each other

X:y is the ratio of the number of men needed to do the work, then the ratio of the time required to do their work is y:x.

Work efficiency means "How much work one person can do in one day (expressed as a percentage)". For example, a person can complete a job in 2 days. In other words, it can be said that he can do 50% of the work in one day. Therefore, its efficiency is 50%.

Time and work related two more questions,

https://brainly.in/question/1957191

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