Our mothers and grannies make dancing skirts for the concert. For one skirt they need

2 1/2 meters(m) of fabric. The fabric costs R6 a meter

To calculate the cost of fabric required for one skirt, we can multiply the length of fabric (2 1/2 meters) by the cost per meter (R6).

Convert 2 1/2 meters to a decimal by adding the whole number part (2) and the fractional part (1/2) together:
2 + 1/2 = 2 + 0.5 = 2.5 meters

Now, multiply the length of fabric (2.5 meters) by the cost per meter (R6):
2.5 meters * R6/meter = R<<2.5*6=15>>15

Therefore, for one skirt, the cost of fabric is R15.

To find the total cost of fabric needed for one skirt, we need to multiply the length of fabric required by the cost per meter.

Given:
Length of fabric required for one skirt = 2 1/2 meters (or 2.5 meters)
Cost per meter of fabric = R6

To calculate the total cost of fabric needed for one skirt, we can use the formula:

Total Cost = Length of fabric required × Cost per meter

Substituting the given values:

Total Cost = 2.5 meters × R6

Now let's do the math:

Total Cost = 2.5 × 6
= 15

Therefore, the total cost of fabric needed for one skirt is R15.

If they need 2 1/2 meters of fabric for one skirt, and the fabric costs R6 a meter, then the cost of fabric for one skirt is 2 1/2 * R6 = R<<2+1/2*6=15>>15.

Therefore, the cost of fabric for one skirt is R15.