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Đáp án:
Giải thích các bước giải:
Nửa chu vi thửa ruộng là :
Chiều dài thửa ruộng là :
Chiều rộng thửa ruộng là :
Diện tích thửa ruộng là :
Thu hoặc được số thóc là :
Đáp số :
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
Nửa chu vi thửa ruộng đó là : 200 : 2 = 100 ( m )
Chiều dài thửa ruộng là : 200 : ( 1 + 3 ) x 3 = 150 ( m )
Chiều rộng là : 200 - 150 = 50 ( m )
Diện tích thửa ruộng đó là : 150 x 50 = 7500 ( m2 ) = 0,75 ha
Ta có : 100 m2 : 53 kg thóc
7500 m2 : ?? kg thóc
Thửa ruộng đó thu hoạch được : 7500 : 100 x 53 = 3975 ( kg ) = 3, 975 tấn
TL:
Bài giải:
Nửa chu vi thửa ruộng đó là:
200 : 2 = 100 ( m )
Tổng số phần bằng nhau là:
1 + 3 = 4 ( phần )
Chiều dài của thửa ruộng đó là:
( 100 : 4 ) x 3 = 75 ( m )
Chiều rộng của thửa ruộng đó là:
100 - 75 = 25 ( m )
a. Diện tích của thửa ruộng đó là:
75 x 25 = 1875 ( m2 )
b. Số thóc thửa ruộng đó thu hoạch được là:
1875 : 100 x 53 = 993.75 ( tấn )
Đáp số: a. 1875 m2
b. 993.75 tấn thóc
- HT -
Chiều rộng thửa ruộng là
30 x 3 = 90 ( m )
Chiều dài thửa ruộng là
90 + 30 = 120 ( m )
Diện tích thửa ruộng là
120 x 90 = 10800 ( m2)
Thửa ruộng thu hoạch được
10800 : 100 x 68 = 7344 ( kg )
Đáp số 10800 m2
7344 kg thóc
chiều dài của thửa ruộng là :
30 : (4 - 3) x 4 = 120 (m)
chiều rộng của thửa ruộng là :
120 - 30 = 90 (m)
a) diện tích của thửa ruộng là :
120 x 90 = 10800 (m2)
b) cả thửa ruộng thu hoạch được số kg thóc là :
10800 : 100 x 68 = 7344 (kg)
ĐS : a) 10800 m2
b) 7344 kg thóc
đúng thì k nha!
Chiều rộng hình chữ nhật là: 140:4.3= 105m
Diện tích hình chữ nhật là: 105.140=14700m2
Trên thửa ruộng đó thu được số kg thóc là: 14700:100.0,5 = 73,5 tạ =7350kg
2)
Nửa chu vi hình chữ nhật là: 3,5:2=1,75km
Chiều dài hình chữ nhật là :1,75:(3+2)3=1,05km = 1050m
Chiều rộng hình chữ nhật là: 1050:3.2=700m
Diện tích mảnh vườn là: 700.1050=735000m2 = 73.5ha
nửa chu vi là
300:2=150 m
chiều dài gấp rưỡi chiều rộng là : 3/2
tổng số phần bằng nhau là
3+2=5 phần
chiều rộng là
150:5x2=60 m
chiều dài là
150-60=90 m
diện tích là
60x90=5400 m2
thửa ruộng đó thu là
5400:100x50=2700 kg
đổi 2700kg=27 tạ
đáp số : a]5400m2
b]27 tạ
chúc bạn học giỏi hơn
tk mình nha
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
a) Nửa chu vi thửa ruộng là 700 : 2 = 350 ( m )
Ta có sơ đồ sau
Chiều dài !___!___!___!___!
Chiều rộng !___!___!___! ( ngoặc tổng là 350m nk )
Chiều rộng thửa ruộng là 350 : ( 3 + 4 ) x 3 = 150 ( m )
Chiều dài thửa ruộng là 350 - 150 = 200 ( m )
Diện tích thửa ruộng là 200 x 150 = 30000 ( m2 )
30000 m2 = 3ha
b) Số thóc thu hoạch được trên thửa ruộng là 3 : 1 x 350 = 1050 ( kg )