Assertion: hippo's foot | /r/HasProperty | 33.5 meters
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text: Zoo visitors can observe hippo behavior on the beach and underwater all year long, as their habitat features 110 feet (33.5 meters) of underwater viewing behind a 2.25-inch-thick (5.7 centimeters) glass window, engineered to withstand the force of a 2-ton (1.8 tonnes) hippo moving at 15 miles per hour (24 kilometers per hour).