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Chiều rộng là : 120 x \(\frac{3}{4}\)= 90 ( m )
a ) Diện tích là : 120 x 90 = 10800 ( m2 )
b ) Thu hoạch là : 10800 : 100 x 15 = 1620 ( kg )
Chiều rộng của thửa ruộng đó là :
\(120x\frac{3}{4}=90\left(m\right)\)
Diện tích của thửa ruộng đó là :
120x90=10800(m2)
Trên thửa ruộng đó thu hoạch được số thóc là :
15x(10800:100)=1620(kg)
Đ/s:a)10800m2
b)1620kg
Đổi : 0,5 km = 500 m
Nửa chu vi thửa ruộng đó là :
500 : 2 = 250 (m )
Vẽ sơ đồ biểu diễn chiều rộng gồm 3 phần bằng nhau và chiều dài gồm 7 phần như thế
Tổng số phần bằng nhau là :
3 + 7 = 10 (phần)
Chiều dài thửa ruộng đó là :
250 : 10 x 7 = 175 (m)
Chiều rộng thửa ruộng đó là :
250 - 175 = 75 (m)
Diện tích thửa ruộng đó là :
175 x 75 = 13125 (\(m^2\))
13125 \(m^2\)=1,1325 ha
b) Trên thửa ruộng đó người ta thu hoạch được số tấn thóc là :
13125 : 100 x 50 = 6562,5 (kg)
6562,5kg = 6,5225 tấn
đs :.....
a, Nửa cv thửa ruộng là 200:2=100(m)
Cd là \(100:\left(1+3\right)\times3=75\left(m\right)\)
Diện tích thửa ruộng là \(75\times\left(100-75\right)=1875\left(m^2\right)\)
b, Thu đc \(1875:100\times53=993,75\left(kg.thóc\right)=0,99375\left(tần\right)\)
Giải
A) Nửa chu vi thửa ruộng là :
200 : 2 = 100 ( m )
Chiều dài là :
100 : ( 1 + 3 ) × 3 = 75 ( m )
Diện tích của thửa ruộng là :
75 × ( 100 - 75 ) = 1875 ( mᒾ )
B) Thửa ruộng đó thu hoạch được số tấn thóc là :
1875 : 100 × 53 = 993,75 ( kg thóc )
= 0,99375
Đáp số : 0,99375
a: Chiều rộng là:
\(\dfrac{250,5-25,5}{2}=112,5\left(m\right)\)
Chiều dài là: \(112,5+25,5=138\left(m\right)\)
Diện tích thửa ruộng là:
\(112,5\cdot138=15525\left(m^2\right)=1,5525\left(ha\right)\)
b: Khối lượng thóc thu được là:
\(15525:100\cdot53=8228,25\left(kg\right)=8,22825\left(tấn\right)\)
a) Chiều rộng thửa ruộng:
\(\left(250,5-25,5\right):2=112,5\left(m\right)\)
Chiều dài thửa ruộng:
\(250,5-112,5=138\left(m\right)\)
Diện tích thửa ruộng:
\(138\times112,5=15525\left(m^2\right)=1,5525\) (héc-ta)
b) Số thóc thu được từ thửa ruộng:
\(15525:100\times53=8228,25\left(kg\right)=8,22825\) (tấn)
ai đó giúp mình với mình thề nếu ai gải có lời văn mà đúng thì mình sẽ k nếu không mình làm con chó
a) Nửa chu vi thửa ruộng là:
200 : 2 = 100 ( m )
Tổng số phần bằng nhau là:
1 + 3 = 4 ( phần )
Chiều dài là:
100 : 4 x 3 = 75 ( m )
CHiều rộng là:
100 - 75 = 25 ( m )
Diện tich thửa ruộng là:
75 x 25 = 1875 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b) thửa ruộng đó thu hoạch được số thóc là:
1875 : 100 x 53 = 993,75 ( kg ) = 0,99375 tấn
ĐS: 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b) 0,99375 tấn
Chiều dài thửa ruộng đó là:
80 x 3/2= 120( m)
Diện tích thửa ruộng đó là:
120 x 80 = 9 600( m2)
Thu được số tạ thóc là:
9 600: 10 x 15= 14 400( kg)
Đổi 14 400kg = 144 tạ
Đáp số: 144 tạ thóc