Question

В нефтехранилище привезли 30 цистерн с нефтью, в каждой из которых было по 16целых 1/2 т нефти. В первый день на перерабатывающий завод отправили 30% всего количества нефти, а во второй день- 80% оставшегося количества нефти. Сколько тонн нефти осталось в нефтехранилище?

Answer 1

30*16,5=495 т всего нефти
495*0,3=148,5 т отправили в первый день
495-148,5=346.5 т осталось после первого дня
346,5*0,8=277,2 т отправили во второй день
495-148,5-277,2=69,3 т осталось в нефтехранилище 
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Answer 2

To solve this problem, we need to calculate the total amount of oil in the storage and then subtract the amount that was sent to the processing plant on the first and second days.

Each of the 30 tanks contains 16 and a half (16 1/2) tons of oil. To find the total amount of oil in the storage, we can multiply the amount of oil in each tank by the number of tanks:

16 1/2 tons/tank * 30 tanks = 495 tons

Therefore, there are a total of 495 tons of oil in the storage.

On the first day, 30% of the total amount of oil was sent to the processing plant. To calculate the amount of oil sent on the first day, we can multiply the total amount of oil by 30%:

495 tons * 30% = 148.5 tons

After the first day, there is 148.5 tons less oil in the storage.

On the second day, 80% of the remaining oil was sent to the processing plant. To calculate the amount of oil sent on the second day, we can multiply the remaining amount of oil by 80%:

(495 tons - 148.5 tons) * 80% = 277.2 tons

After the second day, there is 277.2 tons less oil in the storage.

To find the amount of oil that is still in the storage, we can subtract the total amount of oil sent on both days from the initial total amount of oil:

495 tons - 148.5 tons - 277.2 tons = 69.3 tons

Therefore, there are 69.3 tons of oil remaining in the storage.