Question

It takes eight more than thrice the number of days to produce energy using water power, compared to solar.
If solar takes 9 days to generate 1 unit of energy, then how many days would water power take to generate the same amount of energy?

• A. 31 days
• B. 33 days
• C. 35 days
• D. 37 days

Answer 1

The correct option is C 35 days

Number of days taken for energy production by water = w

Number of days taken for energy production by solar = s

It is given that :
$Ittakeseightmorethanthricethenumberofdaystoproduceenergyusingwaterpowercomparedtosolar.$

$⟹w=3\times s+8$

$\therefore \text{If s = 9, then}$

$w=3\times 9+8$
$=27+8$
$=35$

$\therefore \text{It would take 35 days to produce 1}$ $\text{unit of energy using solar.}$