# Direct relationship - examples

- Tree shadow

Tree perpendicular to the horizontal surface has a shadow 8.32 meters long. At the same time meter rod perpendicular to the horizontal surface has shadow 64 cm long. How tall is tree? - Chocolate

Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates? - Chickens

4 chickens give 4 eggs in 4 days. How many eggs can give 8 chickens for 8 days? - Blood

In human body the blood is about 7.7% body weight. How many kilograms of blood is in the human body with weight 96 kg? - Greenhouses

Two workers would make installation of greenhouses for 54 hours. For how many hours does the installation 9 workers? - Medicament

Same type of medicament produces a number of manufacturers in a variety of packages with different content of active substance. Pack 1: includes 60 pills of 1200 mg of active substance per pack cost 18 Eur. Pack 2: includes 30 pills of 1000 mg of active s - Cow

193 cow consumes 13510 kg hay per day. How many kg of hay consume one cow in one day? - Beer

After three 10° beers consumed in a short time there are 7.4 g of alcohol in 5 kg adult human blood. How much is it per mille? - Ratio

6 numbers are in the ratio 3:3:4:4:5:5. Their sum is 264. What are the numbers? - Saving

Kevin save € 4620 to buy a car. Yet it lacks save 65% of the car price. How much is the car? - Road repair

Road repair took 16 days for 34 workers if they worked 6 hours a day. How many days take repair same road 33 workers if they work 6 per day? - Linear independence

Determine if vectors u=(3; -3) and v=(0; 3) are linear Linear dependent. - Bonus

Gross wage was 1113 USD including 16% bonus. How many USD were bonuses? - Excavation

Mr. Radoslav calculated that excavation for a water connection dig for 10 days. His friend would take 7 days. Radoslav worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of excavation they met? - Accidents

The count of accidents in 1993 caused 8009 women which is 7.1%. How many men caused the accidents? - Arc

Circle arc corresponding to angle is 193° is 23 dm long. What is the length of the entire circle? - Copiers

Three copiers will do the same in an hour k copies. How many copies would be done in an hour by four such copiers? ? - Mailbox

Mailbox is opening at regular intervals 3 times a day. The first time is opened at 6:00 and the last at 16:00. Calculate hours when mailbox is opened during day. - Division

Three siblings Helena, Oliver and George split the bag with candies on merit in the ratio 1:6:3. How many candies should each get if in bag were 210? - Potatoes

Potatoes contain 78.4% starch. How many potatoes need to obtain 93.7 kg of starch?

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