Respuesta :
There are 70 boards need to do the work.
What is Division method?
Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.
Given that;
Jack wants to build a 7-foot-wide, 10-foot-long platform.
And, The dimension of boards are 6 inches wide by 2 feet long.
Now,
Area of platform = 7 × 10
= 70 feet²
And, Area of board = 6 in × 2 ft
= 0.5 ft × 2 ft
= 1 feet²
Thus, Number of boards = Area of platform / Area of board
= 70 / 1
= 70
So, Number of required boards = 70
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