8.From the following particulars compute machine hour rate. Cost of machine 11000, Scrap value 680, Repairs for the effective working life 1500, standing charges for 4 weekly period 1600. Effective working life 10000 hrs. Power used 6 units per hour at 5 paisa per unit, Hours worked in 4 weekly period 120 hrs
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Disadvantages of using ""plastics""
are:
They pollute our environment.
They pose a danger to wildlife.
They do not degrade quickly.
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