If LCM (p, q, r) = 420, HCF (p, q, r) = 1, HCF (p, q) = 3, HCF (q, r) = 5 and HCF (p, r) = 1, then the product of p, q and r is
(1) 630
(2) 6300
(3) 450
(4) 6500
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A carbon footprint is the total amount of greenhouse gases (including carbon dioxide and methane) that are generated by our actions. The average carbon footprint for a person in the United States is 16 tons, one of the highest rates in the world.
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