100÷(100+160+140),
=100÷400,
=25%,
160÷(100 +160+140),
=160÷400,
=40%,
Statistical table for six months Electricity and water consumption
1. First of all, the general water meter has a protective cover on the dial. When you want to check the water consumption on the water meter, first lift the cover.
2. Then there is a rectangular display window on the water meter. The number displayed on it is the current total water consumption. It is marked M3 on the back, which means the unit is cubic. the current total amount minus the last total amount is the water consumption in the nearest section.
3. Although some water meters have different shapes, they usually have a small window showing the number. If M3 is marked on the back, then the total water consumption is approximately equal. to 1 ton of water, youso know how many tons of water are used.
Statistical table of water entering and leaving the swimming pool
(1) 80÷6≈13 (tons)
Answer: Average monthly consumption of water in the first half was 13 tons.
(2) (500+480)×0.52
=980×0.52
=509.6 (yuan)
Answer: Last year's electricity bill was 509.6 yuan.
(1) The statistical table is shown below: Time/second 30 45 Water flow/liter 6 9 (2) Because 30:6=45:9=5 (certain), it is the water flow of this faucet The relationship to the opening time is certain, which conforms to the sense of direct proportion, so the opening time of this faucet is directly proportional to the water flow . So the answer is yes.