Câu 1: trang 167 - toán tiếng anh lớp 5A football field shown on a map with 1:1000 scale is...

In summary, the perimeter of the football field is 0.4 meters and the area of the football field is 0.0099 square meters.

b) Area = length x width = 11cm x 9cm = 99cm². Convert 99cm² to square meters by dividing by 10,000: 99cm² / 10,000 = 0.0099m². Therefore, the area of the football field is 0.0099 square meters.

a) Perimeter = 2(length + width) = 2(11cm + 9cm) = 2(20cm) = 40cm. Convert 40cm to meters by dividing by 100: 40cm / 100 = 0.4m. Therefore, the perimeter of the football field is 0.4 meters.