# Direct relationship - examples

- Tree shadow 3

A 2-meter rod casts a shadow 3.2 m long. How high is a tree with a shadow of 14.4 m ? - Photocopier

A photocopier enlarges a picture in the ratio 7:4. How many times will a picture of size 6cm by 4cm be enlarged to fit on a 30cm by 20 cm page? - Acres

Two hours 24 students harvested chestnuts on 36 acres. How many square meters harvested one student per hour? - Pills

If it takes 20 minutes to run a batch of 100 pills how many minutes would it take to run a batch of 50 pills - 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? - 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 - 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? - 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? - Saving

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

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

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

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

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

Nine meters height poplar tree has a shadow 16.2 meters long. How long shadow have at the same time Joe if he is 1,4m tall? - Motor oil

30 liters of oil cost 28.80 Euros. How much cost a liter?

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