----- Nội dung dịch tự động từ ảnh ----- 50 000 Spape : 40 7 2 cm on map 4 represents 3 km. The area of a park on map 4 is 4.5 cm². (a) b) ge (a) (b) (c) Express the scale of map A in the form 1: n. Calculate the actual area of the park in km². Calculate the area, in cm², of the park on map B which has a scale of 1: 50 000. Two quantities, x and y are in direct proportion such that when x = 4, y = 17. Find the value of y when x = 22. Two quantities, m and n are in inverse proportion such that when m = 30,
