The cost of the wool insulation required for the loft floor is £149.16498
The given parameters are
Roll of wool = 114 cm by 5.2 m
One roll = £19.65 per roll
The area of one roll is calculated as
Area = Length * Width
So, we have
Area = 114 cm x 5.2 m
Convert cm to m
Area = 1.14 m x 5.2 m
Evaluate the product
Area = 5.928 m^2
The cost of the required area of loft floor is
Total cost = Unit cost/Area of 1 roll x Area of floor
This gives
Total cost = £19.65/5.928 * 4.5 * 10
Evaluate the product
Total cost = £149.16498
Hence, the cost of the wool insulation required for the loft floor is £149.16498
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