Question

một khối gỗ hình hộp chữ nhật có diện tích toàn phần bằng diện tích toàn phần hình lập phương có cạnh 6 dm .chiều dài khối gỗ là 12 dm ,chiều rộng là 6 dm.tính chiều cao của khối gỗ đó

Answer 1

troi oi ban da ra chua?>

 

Answer 2

Trả lời đúng vào

Answer 3

Chiều cao là 2 dm 

 

Answer 4

diện tích toàn phần khối gỗ đó là:

         6 x 6 x 6 =216 (dm2)

diện tích hai mặt đáy của khối gỗ là :

       12 x 6 x 2= 144 (dm2)

diện tích xung quanh khối gỗ đó là:

         216 - 144 =72(dm2)

chu vi một mặt của khối gỗ là:

        (12 + 6)x 2= 36(dm)

chiều cao của khối gỗ đó là:

        72 : 36= 2(dm)

           Đ/s: 2 dm

Answer 5

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Answer 6

ập bờ đề

22

222	22

Answer 7

bang 2dm chuan lun 

Answer 8

Kang Kang Yoo làm đúng nhưng ko biết rút gọn phép tính cuối các bạn ạ.

Answer 9

Kang Kang ,,, rút gọn 4 phép tính cuối ,,, các bạn ạ.

Answer 10

là 2dm 

Answer 11

Nếu cạnh hình lập phương gấp lên hai lần , thì diện tích toàn phần của nó gấp lên bao nhiêu lần ?

Answer 12

Dung la 2dm

Answer 13

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Answer 14

CÁC BẠN GIẢI SAI CẢ RỒI !

                     GIẢI

DT TOÀN PHẦN LÀ; 6*6*6=216 (M2 )

DT MỘT KHÚC GỖ LÀ; 12*6=72(M2)

DT XUNG QUANH KHÚC GỖ LÀ; 216:72=144(M2)

CV MẶT ĐÁY CỦA KHÚC GỖ LÀ; (12+6)*2=36(M)

CCAO KHÚC GỖ LÀ; 144:36=4( M)

TÍCK MÌNH NHA !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 15

bang 2cm nhe

Answer 16

hiiiiiiiiiiiiiiiiiiiiiiiiiiii

Answer 17

2 dm nha

Answer 18

2 dm nhé

Answer 19

 Một hình hộp chữ nhật có diện tích toàn phần lớn hơn diện tích xung quanh 214,8cm2 .Tính diện đáy

 hộp 

Answer 20

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