3. Calculate the mechanical advantage of a crowbar of length 240 cm if its fulcrum is at a
distance of 40 cm from the load.
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Government School, Mathura. You
have been asked to write a notice for the students of the school about ‘Slogan Writing’
competition to be held in the school on the occasion of World Environment Day. Write
the Notice, in about 50 words, giving every necessary detail about the competition
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