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A optical cable is to be run from a junction point on the bank of a river 900 meters wide to an office that is located 3000 meters downstream on the opposite bank. If the cost of laying cable under water is Rs. 5 per meter and that of laying overhead on land is Rs. 4 per meter, find the point downstream where the cable is to cut across the river.
(a) 450
(b) 3900
(c) 1800
(d) 2100
(e) 2700
Answer:
1) 450
Since cost of putting cable on land is less than that under water.
So we lay cable mostly on ground so best solution is 450
Since cost of putting cable on land is less than that under water.
So we lay cable mostly on ground so best solution is 450
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