You want to put a fence around your field. the cost of fencing is $60 per meter. the length of the field is 50 meters. if the length of the field is twice the width, determine the cost of fencing the entire field.

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?