Question

The weight of a fruit bun Nisha bought was equal to 300 grams. If she eats 20 grams of the bun, every one hour, what would be the weight of the bun after 2 hours?

Answer 1

Hint: Find the weight of the bun Nisha ate after two hours depending on the given conditions and once you get the value of the bun eaten by Nisha after 2 hours, you subtract this obtained value from the total value of 300 grams, to get the weight of bun left after 2 hours.

Complete step-by-step solution
From the given question ,we get that the total weight of the bun is 300 grams. Given that, in 1 hour of the time, Nisha is consuming 20 grams of the bun. Thus, we now find the weight of the bun consumed by Nisha in a time period of 2 hours.

In order to find this value, we will multiply the value she consumes in an hour by 2.
Thus, we get,
$
  {\text{Consumed weight in 2 hrs}} = 2 \times 20{\text{ grams}} \\
   = 40{\text{ grams}} \\
$

Now, we have found the weight consumed by Nisha in 2 hours, but we need to find the weight of the bun left after 2 hours. For that, we will subtract the value consumed form the total value of the bun when Nisha bought it.
$
   \Rightarrow {\text{Remaining Weight}} = 300{\text{grams}} - 40{\text{grams}} \\
   = {\text{260 grams}} \\
$

Hence, the weight of the bun after 2 hours is 260 grams.

Note: In solving these types of questions, you first need to find the value of what has been consumed by the consumer in that specified time period. After you are done calculating that value, you just need to subtract it from the total value. Also make sure you do not make any calculation mistakes as it might lead to the wrong answer. Make sure the units of what is being asked and what is being given should be the same.