A submarine dives 300 feet below sea level, then rises 120 feet. What is its new depth?

If a boat travels 15 nautical miles per hour, how far will it travel in 4 hours?

A fishing net has 500 holes. If 1/5 of the holes are damaged, how many holes are still usable?

What is the approximate percentage of Earth's surface covered by oceans?

A sailor uses a rope that is 60 feet long. He cuts it into 5 equal pieces. How long is each piece?

A lighthouse flashes every 12 seconds. How many times does it flash in 1 minute?

A map uses a scale of 1 inch = 50 miles. If two islands are 3 inches apart on the map, what is the actual distance between them?

If 3/4 of a ship is above water, what fraction is underwater?

A container holds 20 liters of seawater. If 25% of the water evaporates, how much water is left?

A group of divers descends 20 feet per minute. How deep will they be after 7 minutes?