Answer: $ 400 .
_________________________
Explanation:
_____________________________________
Note that a "consol" is a "perpetuity".
______________________________________________
To find the "PV" (Present Value) of a perpetuity, we use the equation: PV = C / r = Current value / interest rate
= $20 / (5%) = $20 / (5/100) = $20 / (0.05) = $400 .
___________________________________________________