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    9

                                                            Measurement

                                                                    of Length

                    LEARNING ObjEctIvEs

                     After studying this chapter, students will be able to...

                        y  measure length and distance using standard units like centimetre, metre and kilometre
                        y  understand the conversion of units of length

                                                                                                21 st
                                                                                               Century   #Life Skills and Values
                                                                                                Skills
                     Warm Up      Non-Standard to Standard Unit: Measuring Length

                   Once upon a time, in a small village, there
                   was a cloth merchant who sold beautiful
                   fabric. When measuring out the fabric for
                   customers, he used his own forearm, from
                   elbow to fingertips, as his unit of length. He
                   would give one forearm’s length of fabric
                   for 10 rupees.

                   With the passage  of  time,  he  became
                   greedy and thought of an idea to earn more
                   money. Earlier, he used to measure the cloth
                   himself, but now he made his younger son, who was only 8 years old, do the measuring.

                   Can you tell why the shopkeeper made his younger son measure the fabric?
                   Yes, his son’s small arm measured a shorter distance. Therefore, for the same 10 rupees,

                   the customers received less cloth than when the father measured it.

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