1. 
If it takes a crane twenty minutes to lift a load one hundred seventytwo feet, how long will it take the crane working at the same speed to lift the same load three hundred one feet?


2. 
The escalator that goes from the first floor to the second floor in Town Mall is twentythree feet long. It costs $1,075.00 per foot to build an escalator. How much did it cost to build the escalator in Town Mall?


3. 
The new slide on the playground is two times as high as the monkey bars. If the monkey bars are 1.5 meters high, how high is the slide? Express your answer in centimeters.


4. 
After a science lesson about simple machines, Mrs. Marks told her class to make a list of all the examples of the six different kinds of simple machines they could find at home and bring their list to class the next day. Hunter looked for levers. He found a seesaw, a pair of tweezers, a light switch, and his own elbow! Alexis found pulleys on a flagpole, a tow truck, and a crane. Jessica found five examples of the wheel and axle. Joshua found seven examples of the inclined plane. Dylan listed a jar lid, a bolt, a wood screw, and a drill as examples of the screw. Jordan found six examples of the wedge. How many examples of simple machines did these students find in all?


5. 
Mrs. Delano's science class is setting up a display about simple machines for the rest of the school to see. A third of her class is making posters. Fivetwelfths of her class is making models. The rest of her class is writing reports. There are twelve students in her class. How many are writing reports?


6. 
Joshua and Jose want to build a ramp for their skateboards. A ramp is an inclined plane. The top of the ramp is on a stone fence three feet high. The bottom of the ramp is on a 7inch high concrete block. How much higher is the top of the ramp than the bottom?

