Question

A sack of cement is enough to cover a floor with a total area of 45sqft Joel’s floor length is 8ft by 7ft how many sacks will he need to cover his entire floor?

Answer 1

2 sack of cement is needed to cover entire floor of Joel

Solution:

Given that a sack of cement is enough to cover a floor with a total area of 45 sqft

Joel’s floor length is 8ft by 7ft

To find: Number of sacks needed to cover entire floor of Joel

Let us first find area of Joel's floor

Since the floor is generally of rectangular, we can use area of rectangle

$\text{ area of rectangle } = length \times width$

So the total area of floor with length 8 feet and width 7 feet is:

$\text{ area of floor } = 8 \times 7 = 56$

Thus the total area of floor is 56 square feet

Let us now find number of sacks needed to cover entire floor

Given that, one sack of cement covers 45 square feet

$\text{ number of sacks needed } =\frac{\text { total area of floor }}{\text { area covered by one sack }}$

$\text{ number of sacks needed }=\frac{56}{45}=1.244$

Since Sack of cement cannot be in point value hence we can say 2 sack of cement is required.