Respuesta :

Answer:

A=276 cm²

Step-by-step explanation:

A=2(wl+hl+hw)

A=2(4x7+ 10x7+10x4)

A=2(28+70+40)

A=2(138)

A=276 cm²

A= 276 cm^2 because the formula is S.A= 2lw + 2lh + 2wh