exam Maths Puzzle Numerical Ability

Find the volume of a solid uniform crosssection with an area of 6.5 cm^2 and height, 24 cm. (take pi as 3.142)

I dont understand what the problem is asking for. Even if i did, I would not be able to solve it probably. Please help.

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Tom walked to the meeting at 2 miles per hour and caught a ride home in an old truck at 10 miles per hour. How far was it to the meeting place if his total travel time was 18 hours? Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not? Give examples.