Basil bought a total of game cards at a big discount. Some of the cards cost R0,25 each and some cost R0,15 each. If Basil spent R4,20 to purchase these cards, how many cards of each type did he buy

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?