Đáp án:
Bài giải
a,Chiều rộng mảnh đất là
120-70=50 (m)
Diện tích mảnh đất là
70 × 50=3500(m²)
b,Diện tích bồn hoa là
3500-3451=49(m²)
Vì diện tích bồn hoa là 49 m²
⇒Cạnh của bồn hoa là 7 m
Đ/S
a, 3500 m²
b, 7m
@tuanbach1104
Chúc bạn học tốt
Giải thích các bước giải:
`a,`
Chiều rộng mảnh đất là:
`120 - 70 = 50 (m)`
Diện tích mảnh đất là:
`70 xx 50 = 3500 (m^2)`
`b,`
Diện tích bồn hoa là:
`3500 - 3451 = 49 (m^2)`
Vì `7 × 7 = 49` nên cạnh bồn hoa là `7 m`
Đáp số:
`a) 3500 m^2`
`b) 7 m`
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