Use your measuring tape then you times that by 30
Calculate the area of a poster that measures 40 inches by 14 inches?
You may measure them in inches but you cannot calculate them in inches.
560 squared inches
To find the average height of a group of individuals, you would need to add up the heights of all the individuals and then divide by the number of individuals. If the tallest person is 72 inches tall, you would need to know the heights of the other individuals in the group to calculate the average height.
Average is 16 to 20 inches. 18 inches is normal.
It is simply a length of 90 inches.
in inches
45 linear inches is simply a length of 45 inches.
For adult females, the average step length is about 26 inches and the average stride length is around 52 inches. For adult males, the average step length is 31 inches and the average stride is 62 inches.
It is simply a length of 60 inches.
226.865 squared inches
It isn't clear what exactly you want to calculate.