Answer: 70 boards.
Step-by-step explanation: To solve this problem we just need to divide the mesurements of the platform by the mesurements of the boards (dividing the widths and the lenghts respectively), notice that the mesurements that we are dividing, must have the same units (inches or feet).
Width:
n1(number of boards to fill in the width)=width of the platform/width of the boards
width of the platform= 7 feet* 12 inches/1feet=84inches
n1=84inches/6inches=14.
Lenght:
n2(number of boards to fill in the lenght)=lenght of the platform/lenght ofthe boards
n2=10feet/2feet=5
The total number of boards will be the multiplication of n1 by n2:
N=n1*n2
N=14*5
N=70 boards.
