30. When two bodies approach each other with uniform speeds, the distance between them de by 120m per every 1 minute. When they go a each other, the distance between them increa m per every 1 minute. The speeds of the b respectively 1) 2m/s and 0.5m/s 2)3m/s and 2m/s 3) 1.75m/s and 0.25m/s 4)2.5m/s and 0.
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