There is a rope ladder hanging over the side of a ship. Each of the rungs of the ladder are a metre apart. The tide rises at the rate of 80 centimetres an hour. How many rungs are covered after four hours? NEXT > by
There is a rope ladder hanging over the side of a ship. Each of the rungs of the ladder are a metre apart. The tide rises at the rate of 80 centimetres an hour. How many rungs are covered after four hours? NEXT > by