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1.A lamp post is painted in black and white in the ratio of 3:2.If the length of the white portion is 4m,find the lengthof the lamp post.
2.Carmen spends 15%,30% and 35% of her pocket money on transpotation,lunch and savings respectively,and the rest is spent on entertainment.Find the ratio of the amounts spent on transportation,lunch and entertainment.
3.The length of a wire is 360 cm.
(a) If it is divided into 3portions in the raio of 1 : 3 : 8,find the length of the longest portion.
(b) If the wire with the longest portion is bent into a rectangle with its length and width in the ratio of 3:2,find the length and width of the rectangle.
更新1:
請大家以英文回答問題,plz~
