A Swimmer Heading Directly Across a River 200 M Wide

question 23

Short Answer

A swimmer heading directly across a river 200 m wide reaches the opposite bank in during which time she is swept downstream 480 m.
(a)How fast can she swim in still water?
(b)What is the speed of the current?

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Definitions:

Fast Mapping

The process by which children rapidly learn a new word after a brief encounter.

Logical Reasoning

The process of using rational, systematic steps based on sound mathematical procedures and given statements to arrive at a conclusion.

Overextension

A linguistic phenomenon where a child applies a word in a broader context than is appropriate, indicating the developmental process of language acquisition.

Receptive Vocabularies

The words a person can understand and recognize, even if they cannot actively use them in speech or writing.