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18 July, 10:10

A teacher needs 70 lengths of string cut to 40cm each. If balls of string are 10 m long, how many balls will be needed.

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  1. 18 July, 11:55
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    Step-by-step explanation:

    A ball is 10 meters. Since 100 centimeters are in a meter, each ball has 100*10 = 1000 centimeters.

    The teacher needs 70 strings each 40 centimeters. The total amount they need is 70*40 = 2800 centimeters.

    Since a ball has 1000 centimeters, 2800 centimeters will need 3 balls for a total of 3000 centimeters.
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