C

1003085405

Level: 
C
Little Red Riding Hood ran (at instantaneous speed) through the forest to see her grandmother, who lives in a cottage, which is \( 4\,\mathrm{km} \) distant. If she ran by \( 4\,\mathrm{km/h} \) faster, she would meet her grandmother \( 10 \) minutes sooner. What was Little Red Riding Hood’s speed?
\( 8\,\mathrm{km/h} \)
\( 12\,\mathrm{km/h} \)
\( 10\,\mathrm{km/h} \)
\( 6\,\mathrm{km/h} \)

1003090508

Level: 
C
A factory is supplied with raw materials by rail. Due to the renovation of the track, the time of passing the goods from the warehouse to the factory increased by \( 25\% \). How much did the average speed of carriage on the delivery route decrease?
by \( 20\% \)
by \( 25\% \)
by \( 4\% \)
by \( 75\% \)

1003090507

Level: 
C
A certain amount of money was put into a bank account for an annual deposit of \( 3.5\% \) per year. After a year the bank paid a tax in the amount of \( 14 \) zlotys from the gained interests. What amount was placed on the deposit if the interest tax amounted to \( 20\% \)?
\( 2000 \) zlotys
\( 2500 \) zlotys
\( 3000 \) zlotys
\( 1400 \) zlotys

1003090504

Level: 
C
Interest on two construction loans of the total value of \( 100000 \) zlotys amounts to \( 3.150 \) zlotys a year with the interest rate on one of the loans being \( 3\% \) and the other \( 3.5\% \). Calculate the amount of each of these loans.
\( 70000 \) zlotys of \( 3\% \) interest rate loan and \( 30000 \) zlotys of \( 3.5\% \) interest rate loan
\( 30000 \) zlotys of \( 3\% \) interest rate loan and \( 70000 \) zlotys of \( 3.5\% \) interest rate loan
\( 50000 \) zlotys of \( 3\% \) interest rate loan and \( 50000 \) zlotys of \( 3.5\% \) interest rate loan
\( 80000 \) zlotys of \( 3\% \) interest rate loan and \( 20000 \) zlotys of \( 3.5\% \) interest rate loan

1003090503

Level: 
C
The total weight of two alloys is \( 800\,\mathrm{kg} \). In the alloy containing \( 4.5\% \) of lead (Pb) there is by \( 19\,\mathrm{kg} \) of lead more than in the other, containing \( 4\% \) of lead. How many kilograms of lead is in each of these alloys?
\( 8 \) kilograms (\( 4\% \) Pb) and \( 27 \) kilograms (\( 4.5\% \) Pb).
\( 18 \) kilograms (\( 4\% \) Pb) and \( 37 \) kilograms (\( 4.5\% \) Pb).
\( 36 \) kilograms (\( 4\% \) Pb) and \( 55 \) kilograms (\( 4.5\% \) Pb).
\( 10 \) kilograms (\( 4\% \) Pb) and \( 29 \) kilograms (\( 4.5\% \) Pb).