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- Total regular beams = 42 × 18 = <<42*18=756>>756.
- Number of backup beams = 756 ÷ 6 = <<756/6=126>>126.
- Total beams = 756 + 126 = <<756+126=882>>882.
- A cartographer maps a rectangular region that is 150 km wide and 240 km long. If each grid square on the map represents 6 square kilometers, how many grid squares are needed to cover the entire region?
- Area of region = 150 × 240 = <<150*240=36000>>36,000 km².
- Number of grid squares = 36,000 ÷ 6 = <<36000/6=6000>>6,000.
