Answer:
Time required for 1st pillar is "716 person/hr" and for 25th pillar is "120 person/hr".
Explanation:
Time for the 1st pillar will be:
⇒ [tex]T(8)= T(1)\times \frac{8 \ log (0.68)}{log \ 2}[/tex]
[tex]225=T(1)\times 0.314432[/tex]
[tex]T(1)=\frac{225}{0.314432}[/tex]
[tex]T(1)=716 \ person/hr[/tex]
Time for the 25th pillar will be:
⇒ [tex]T(25)=761\tines \frac{25 \ log(0.68)}{log \ 2}[/tex]
[tex]T(25)=120 \ person/hr[/tex]