A power unit is by the bank of a river 1500m wide.
It is required to construct a power plant on the side of the river opposite to the power unit and 3000mfrom the unit.
A cable has to be laid from the power unit to the power plant.
The cost of laying the cable under water and on the land is Rs 100 per m and Rs 10 per m respectively.
If we want to minimize the total cost of laying the cable,
where should the plant be located?

750 m from the river bank
1500 m from the river bank
1200 m from the river bank
3000 m from the river bank

• option B. The distance required in between the powerunit and powerplant is 3000m
  .the river is 1500 m wide so the plant should be located at 3000-1500=1500m from the river bank
• 12 years agoHelpfull: Yes(15) No(2)