Arectangular plot of land is 100 feet long and 50 feet wide how long is the walkway along the diagonal? round to the nearest foot.

Length - 100feet
Width - 50 feet
Acc to Pythagoras theorem 
Diagonal = sqrt( Length^2 + Width^2)
= sqrt( 100^2 + 50^2)
= sqrt (10000 + 2500)
= sqrt(12500)
= 111.8

So diagonal is around 112 feet long. 

A) for the n row: 22+(n-1)×6therefore,b) 100-22=78that means (n-1)×6=7878÷6=1313+1=1414th row has 100 seats