# Mass + percentages - math problems

#### Number of problems found: 78

- Mixture

How many percentages mixtures do we get by adding 23ml of matter to 89ml of water? - Crystal

The crystal grows every month 1.2 permille of its mass. For how many months to grow a crystal from weight 177 g to 384 g? - Base of percentages

7% of the base is 35 kg. What is 39% of that base? - Barrel of oil

Barrel of oil weighs 283 kg. When it mold 26% oil, weighed 216 kg. What is the mass of the empty barrel? - Cacao

Cacao contains 34% filling. How many grams of filling are in 130 g cacao. - Radioactive material

A radioactive material loses 10% of its mass each year. What proportion will be left there after n=6 years? - Potatoes

Potatoes contain 78.6% starch. How many potatoes need to obtain 27 kg of starch? - Butter fat

A quarter of kg butter contains 82% fat. How many grams of fat are in four cubes of butter? - Mushrooms

Mushrooms lose 90% by weight drying. How many fresh mushrooms are needed for 5 kg of dried mushrooms? - Electric cooker

During which time t does an electric cooker with power input P = 500 W and with efficiency n = 75% heat water with mass m = 2 kg and temperature t1 = 10°C to the boiling point (t2 = 100°C). The specific heat capacity of water is c = 4 180 J. Kg-1. K-1 - Weightlifter

Weightlifter lifted 75% of its weight. Determine how much weight lifted when he weighs 132 kg. - Carrot seed

Carrot seed germination is 85%, weight 1000 carrots seeds are 2.4g. How many seeds are likely to germinate if we sow 8g of seeds? - Meat loses

Meat loses 18% of its weight by smoking. How much raw meat butcher used to manufacture 35 kilos of smoked? - Water percent

A 15 g sample of the substance contains 70% water. After drying, the weight was reduced to 9 g. What percentage of water is now in the sample? - Bakery

How heavy must prepare bread at a bakery if lose during baking 16% of water and after baking must have 2 kg? (Calculate to the nearest gram) - Apple variete

This year, my uncle harvested 350 kg of apples, including 105 kilograms of Ontario, and the rest is Jonathan. Determine what percentage of the Jonathan apples. - Drying apples

By drying, apples lose 85% of their weight. How many kgs of dried apples do we get from 820 kilograms of fresh? - Clogging

How much distilled water must the pharmacist add to 30g of a 30% hydrogen peroxide solution to obtain a 3% solution to clogging? - Metal alloy

What is the ratio of metals in the alloy that is in the 50 tonnes of steel to 30 kg nickel? - Tare

Gross weight of shipment is 6927 kg and its tare is 7%. Calculate the net weight of the shipment.

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