Grade 7 Mathematics Skill Builder + CMAS Assessment Rehearsal Unit 3

Grade 7 Mathematics Skill Builder + CMAS Assessment Rehearsal Unit 3

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Kyle is filling up a small ditch with gravel from his creek bed. He is carrying the gravel in a 5 gallon bucket. It takes him 2 minutes to walk from the creek to the ditch with a full bucket of gravel and only 1 minute to walk back with the empty bucket. It takes him 1 minute to fill the bucket with gravel. The ditch is approximately the shape of a half-cylinder with a radius of 1 ft and a length of 10 ft. A 5 gallon bucket is equivalent in volume to about 0.65 ft3. Kyle is just about to walk from the ditch to the creek for the first time with an empty bucket. It is 8:07 AM. What time will it be when he dumps the last bucket of gravel to fill up the ditch? Be sure to specify AM or PM when you write your answer in the box below like 1:11AM or 1:11PM.
Use π = 3.14.