Question

The Des Plaines River Bridge is 2.1 km long. Engineers are considering re-lighting the bridge with a pole placed every 110 feet of the bridge length starting from the south end. Each pole will support four light globes. How many globes will be required for the re-lighting project?

Answer 1

1km = 3281 feet

3281/110 = 29.8 (number of poles needed)

29.8 rounded down is 29. (You round down I assume because there is no extra space to put the light poles)

29 x 4 ("4" representing number of lights on each pole)

116 lights required