Question

Although solar gadgets are costly but their running make it cost effective prove it mathematically

Answer 1

Given : solar gadgets are costly but their running make it cost effective

To find : prove it mathematically

Solution:

1 kW Solar System will Cost Rs 60000 in installation

Rs 20000 Cost for Battery & maintenance for a period of  5 Years

Using 1 kW Solar System one can easily get power for  250 units

Cost of one unit to be paid for Electrical connection Rs 4

Monthly Saving = 250 * 4 = 1000

Year;y Saving = 12 * 1000 = Rs 12000

Saving  in  10 Years  =  10 * 12000 = Rs 120000

Cost in 10 Years = 60000  + 20000 = Rs 80000

Against Cost of Rs 80000 , Saving is  Rs 120000

Net Saving = 120000 - 80000 = Rs 40000

Hence its Cost effective for long term

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