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6 September, 14:01

Jenny left her house at 8 a. m. and went to school at a speed of 2 2 3 mph. Her brother Jim left house 4 minutes later and went to the same school. What must his speed be if he wants to keep the same distance between his sister and himself?

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  1. 6 September, 15:16
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    Jim will maintain the distance if he goes to school at the same speed as Jenny's.

    Jim's speed must be 2 2/3 mph.
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