Answer:
140 inches
Step-by-step explanation:
The design of the staircase treads is 10 inches deep and 7 inches rise.
The total height of the staircase is 8 feet and 2 inches.
Present the height of staircase in inches as;
1 foot = 12 inches
8 ft=?
Apply cross-product as (8*12)/1 =96 inches
Total height in inches of the staircase= 96+2 = 98 inches
Finding the number of times the tread's height fits in the total height will be;
98/7 =14 times
The floor space for the staircase will thus be; 10*14 =140 inches
