34.5 minutes
hope this helped!
5 feet is equal to 60 inches. 60 inches divided by 2.5 inches per hour means it would take 24 hours for the drill to reach five feet (assuming it maintains the same rate of digging)
Answer:
common difference(d) = 11
first term (a)=11
then the nth term
=a+(n-1)d
=11+ (n-1)*11
=11+11n-11
=11n
total surface area Stot = 560.27389106325 ft2
lateral surface area Slat = 416 ft2
top surface area Stop = 124.27389106325 ft2
bottom surface area Sbot = 124.27389106325 ft2
The number 4,278 I think.
Hope this helps!