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Hoàng Mạnh Tùng
Giới thiệu về bản thân
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sai rồi!
2001đến năm 2101
??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
Nửa chu vi hình chữ nhật đó là :
400 : 2 = 200 ( m )
Chiều rộng hình chữ nhật đó là :
200 : ( 2 = 3 ) x 2 = 80 ( m )
Chiều dài hình chữ nhật đó là :
200 - 80 = 120 ( m )
Diện tích hình chữ nhật đó là :
80 x 120 = 9600 ( m2 )