mình cần gấpp ạa , m c ơn tr ạa

Hoàng 2k10:

$V_{1}$=$a_{1}$.$b_{1}$.$c_{1}$=5,5 . 5,3 . 2=58,3

$V_{2}$=$a_{2}$.$b_{2}$.$c_{2}$=5,4 . 3,2 . 2,1=36,288

$V_{3}$=$a_{3}$.$b_{3}$.$c_{3}$=5,5 . 3,4 . 1,9=35,53

$V_{tb}$=$\frac{V_{1}+V_{2}+V_{3}}{3}$ =$\frac{58,3+36,288+35,53}{3}$≈43,37

   mong tus cho 5* vs cảm ơn :3

`\text{Ta có:}`

`V_1=a_1.b_1 .c_1=5,5 . 5,3 . 2=58,3(m^3)`

`V_2=a_2.b_2.c_2= 5,4 .3,2 . 2,1 =36,228(m^3)`

`V_3=a_3 .b_3 .c_3 =5,5 .3,4 .1,9=35,53(m^3)`

`V_(tb) = (V_1 + V_2 + V_3)/3=(58,3+36,228+35,53)/3~~43,35(m^3)`

`m_(tb) = (m_1 +m_2 +m_3)/3=(30+30,1+29,9)/3=30(kg)`