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Hiệu số phần bằng nhau là :
4-3=1 ( phần )
Chiều dài mảnh vườn là :
15 : 1 x 4 = 60 (m)
Chiều rộng mảnh vườn là :
15 : 1 x 3 = 45 (m)
Diện tích mảnh vườn là :
60 x 45 = 2700 ( m2)
Đáp số : 2700 m2
hộ
#Kng
1. David had gone home before we arrived.
– After David had gone home, we arrived.
2. We had lunch then we took a look around the shops.
– Before we took a look around the shops, we had lunch
3. The light had gone out before we got out of the office.
– When we got out of the office, the light had gone out
4. After she had explained everything clearly, we started our work.
– By the time we started our work, she had explained everything clearly
5. My father had watered all the plants in the garden by the time my mother came home.
– Before my mother came home, my father had watered all the plants in the garden.
\(\left|x-2021\right|=x-2021\)
\(\Leftrightarrow x-2021\ge0\)
\(\Leftrightarrow x\ge2021\)
Vậy nghiệm của pt là \(x\ge2021\)
Bán kính hình tròn:
\(\dfrac{6}{2}=3\left(dm\right)\)
Diện tích hình tròn:
\(3\times3\times3,14=28,26\left(dm^2\right)\)
Bán kính hình tròn đó là :
6 : 2 = 3 ( dm )
Diện tích hình tròn là :
3 x 3 x 3,14 = 28,26 ( dm2 )
Vậy đáp án là B
\(\dfrac{5}{8}+\dfrac{4}{3}=\dfrac{15}{24}+\dfrac{32}{24}=\dfrac{15+32}{24}=\dfrac{47}{24}\)
\(\dfrac{2}{5}+\dfrac{4}{5}:4=\dfrac{2}{5}+\dfrac{1}{5}=\dfrac{2+1}{5}=\dfrac{3}{5}\)
\(\dfrac{3}{8}\times\dfrac{7}{4}-\dfrac{3}{8}=\dfrac{21}{32}-\dfrac{3}{8}=\dfrac{21-12}{32}=\dfrac{9}{32}\)
\(\dfrac{6}{5}-3:\dfrac{15}{4}=\dfrac{6}{5}-\dfrac{4}{5}=\dfrac{6-4}{5}=\dfrac{2}{5}\)