Question

A school uniform requires 4.5 metres of fabric. Determine the amount of fabric needed to produce such school outfits for 12 students.

• A. 65 m
• B. 67.5 m
• C. 675 m
• D. 60 m

Answer 1

The correct option is B 67.5 m

Fabric required to produce a School outfit = 4.5m

Number of uniforms to be made = 12

$\text{Total fabric required}=4.5\times 12$

Steps to solve $4.5\times 12$
Step 1: Count the number of digits after decimal point in 4.5.i.e 1

Step 2: Ignore a decimal point and perform the multiplication, as you would with whole numbers as follows

Step 3: Now place a decimal point back.
4.5 has 1 decimal place. So, move the decimal point 1 places to the left in the product.
Hence, 67.5 m cloth is required to make 12 dresses.