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nguyetchi2007
2 năm trước
Một mảnh đất hình hình chữ nhật có chiều dài x(m), chiều rộng y(m). Người ta mở một lối đi xung quanh vườn( thuộc đất của vườn) rộng z(m)(x,y>2z) a) Tính diện tích đất làm vườn đi theo x,y,z b)Tính diện tích đất dành làm đường đi biết x=50, y=30, z=2 c) Tìm chiều dài và chiều rộng mảnh đất biết diện tích đất làm vườn là 384m vuông, chiều rộng đường đi là 2 m và chiều dài hơn chiều rộng là 2 m
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