Qn. 10-A delivery man has to deliver milkpackets to four houses which are numberedas on a number line. He has packets forhouse numbers -5,20,-15,30. If he hasdelivered the packet at house number -15,write the order in which he should deliverthe packets to minimise his walk.
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ndxnmdmddnxnmxnmxnmxdnmxdnmxdnxnxdnmxmd
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