⟩ A power cable is to be run from a power plant on the bank of a river 900 meters wide to a factory 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
tht point downstream where the cable is to cut across the river = 3000-900=2100
so the answer is 2100.
if cost is to be calculated then (2100*4)+(2100*5)=18900
