A canteen transported a pile of coal, which was originally planned to burn 0.6 tons per day, but it was burned out in 50 days. In fact, it saved 0.1 tons per day. How many days can this pile of coal actually be burned

A canteen transported a pile of coal, which was originally planned to burn 0.6 tons per day, but it was burned out in 50 days. In fact, it saved 0.1 tons per day. How many days can this pile of coal actually be burned

0.6x50 ÷ (0.6-0.1) = 60 days

1. The canteen delivered a pile of coal, which has burned 35% of this pile of coal, just burning 910t. How many tons of coal has the canteen delivered?
2. The canteen delivered a pile of coal, which has burned 35% of the coal, and 910t is left. How many tons of coal has the canteen delivered? 3. Huaxing Electronics Co., Ltd. produced 3000 mobile phones last week, with a qualified rate of 99.8%. How many mobile phones were unqualified last week? 4. After 20% discount, the price of each movie ticket is 6 yuan cheaper than the original price. How much is the original price of a movie ticket?
5. 910 tons of coal has been transported to the canteen, and 35% of the coal has been burned. How many tons of coal are left?

1
910÷35%＝2600t
two
910÷(1-35%)=1400t
three
3000 × (1-99.8%) = 6 sets
four
6 (1-80%) = 30 yuan

35% of the coal in the canteen has been burned, just 140 tons. How many tons of coal was there in the canteen?

The original 35% is 140 tons, which is equal to the original tons multiplied by 35%
Therefore, the original tonnage = 140 / 35% = 400 tons

There is a pile of coal in the canteen, which has burned 270 kg. The ratio of the burned coal to the remaining coal is 3:5. How much is this pile of coal?
emergency

Take this pile of coal as 5 + 3 = 8 parts, then burn 3 parts and leave 5 parts
Each is 270 / 3 = 90 kg
Total 90 * 8 = 720kg