Assertion: sperm whale's male | /r/CapableOf | weigh about 41,000 kilograms
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text: Mature males average 16 meters (52 ft) in length and weigh about 41,000 kilograms (45 short tons); but some may reach 20.5 meters (67 ft), and weighing up to 57,000 kilograms (63 short tons).