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primary 6 | Maths
| Geometry
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Date Posted: 3 years ago
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For every 12cm along the perimeter of the bulletin board, 3/4 of the circular paper is used as decoration.
Number of decorations used along the horizontal side of the board = 324cm/12cm = 27.
Number of decorations used along the vertical side of the board = 288cm/12cm = 24.
Remember that the decorations at the corners of the board are both along the horizontal and vertical sides, so to avoid counting them twice, we subtract 4 from the total.
Number of decorations altogether = 2 * (27+24) - 4 = 98.
Number of decorations used along the horizontal side of the board = 324cm/12cm = 27.
Number of decorations used along the vertical side of the board = 288cm/12cm = 24.
Remember that the decorations at the corners of the board are both along the horizontal and vertical sides, so to avoid counting them twice, we subtract 4 from the total.
Number of decorations altogether = 2 * (27+24) - 4 = 98.
Each decoration is made of 3/4 of the circular paper.
Number of circular paper used = 98 * 3/4 = 73.5
But wait! Circular papers don't come in halves, they come as a whole!
So we round up 73.5 to get 74 circular papers as the answer.
Number of circular paper used = 98 * 3/4 = 73.5
But wait! Circular papers don't come in halves, they come as a whole!
So we round up 73.5 to get 74 circular papers as the answer.
Thanks. But can i please confirm what’s the final answer?
Thanks !
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