A power unit is there by the bank of the river of 750 meters width. A cable is made from power unit to power plant opposite to that of the river and 1200mts away from the power unit. The cost of the cable below water is Rs.15/- per meter and cost of cable on the bank is Rs.12/-per meter. Find the total of laying the cablea. 15550 b. 15650 c. 16560 d. 16650 e. None of these

aishs8

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• Jan 23rd, 2011

River width=750 mBank width=(1200-750)=450mCost of cable along river=750*15 =11250Cost of cable along bank=450*12=  5400Total cost of cabling =11250+5400 = 16650

aishs8

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• Jan 23rd, 2011

29 mice are required to test the cans.As the time constarint of 24 hours is mentioned, I think this is optimal.We can discard 30th can as even if one mice dies, we can find the poisoned can.

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