A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 75 paise per sq m is
Area to be plastered = 2l+b×h+l×b
=225+12×6+25×12=744sq.m
Cost of plastering = 744×75100=Rs.558
The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Its area is:
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