If it takes a man one hour to dig a hole two metres long, two metres wide, and two metres deep, how long would it take the same man to dig a hole four metres long, four metres wide, and four metres deep, assuming he digs at the same rate of speed?
Answer
Eight hours. It takes twice as long to double the length, twice as long to double the width, and twice as long to double the depth. To find cubic measurement you multiply length x width x height; therefore, on the first hole, one hour equals 2m x 2m x 2m = 8 cubic metres. On the second hole, the formula is 4m x 4m x 4m=64 cubic metres.
