Ai giải bài này giúp mik với mình đang cần gấp
xong rồi kb vs mình nha
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9 giờ 5 phút = 545 phút
4 ngày 4 giờ = 100 giờ
1/5 phút = 12 giây
1/4 phút = 15 giây
1/3 giờ = 20 giây
1/4 thế kỉ = 25 năm
Diện tích mỗi hình vuông nhỏ là
100 : 4 = 25 ( cm2 )
Ta có 25 = 5 x 5
=> cạnh của mỗi hình vuông nhỏ là 5 cm
Chu vi hình vuông nhỏ là 5 x 4 = 20 ( cm )
Đáp số : 20 cm
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Tổng 4 số là :
200 x 4 = 800
Tổng của 5 số là :
800 + 2010 = 2810
TBC của 5 số là :
2810 : 5 = 562
Nửa chu vi thửa ruộng HCN là
648 : 2 = 324 (m)
Chiều dài thửa ruộng là
(324 + 72) : 2 = 198 (m)
Chiều rộng thửa ruộng là
198 - 72 = 126 (m)
a) Diện tích thửa ruộng là
198 x 126 =24948 (m)
b) Trên thửa ruộng thu hoạch được số kg thóc là
24948 : 4 x 15 = 93555 (kg)
Đ/S : a) 24948
b) 93555