Blair is decorating a birthday cake with candles. The cake has a diameter of 15 inches. She wants to place the candles about every 6 inches around the edge. How many candles will she need?
How could i solve this problem?
C = pi * d
C = 3.14 * 15
C = 47.1 inches
47.1 / 6 = 7.85
She could use 7 or 8 candles. I suggest 7 candles since she wouldn't want to put them exactly on the edge.
To solve this problem, you can start by determining the circumference of the cake, as this will give you the total distance around the edge. The circumference of a circle can be found using the formula:
Circumference = π × diameter
In this case, the diameter of the cake is given as 15 inches. Therefore, the circumference is:
Circumference = 3.14 × 15
Next, you can divide the circumference by the spacing between the candles (6 inches) to determine the number of candles needed. Since we need to place them approximately every 6 inches, we will need to round up to the nearest whole number.
Number of candles = Circumference / Spacing
In this case, the calculation would be:
Number of candles = (3.14 × 15) / 6
Now, let's calculate the final answer:
Number of candles = (47.1) / 6
To get the exact number of candles, we need to round up to the nearest whole number:
Number of candles = 7.85 (rounded up to 8)
So, Blair will need 8 candles to place them approximately every 6 inches around the edge of the cake.
In summary, you can solve this problem by calculating the circumference of the cake and dividing it by the spacing between the candles. Remember to round up the result to the nearest whole number.