This extraordinary lateral thinking question will make you think outside the box. Why are manhole covers round? Can you answer this intriguing riddle?
Lateral Thinking Puzzle: Mystery of Round Manhole Covers |
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2 comments:
Is it because the when we use other shapes like rectangles or squares, they can rotate about diagonals and fall down?
Yes, you are right. Diagonal will bigger than side for a square or rectangular shape and these can fall down along the diagonals if rotated.