In ΔABC, N is any point on the median AM, where M is on the side BC. If ar(ABC)=80 cm2 and ar(BMN)=12 cm2, then the area of ΔABN is

In ΔABC, N is any point on the median AM, where M is on the side BC.

1.	In ΔABC, N is any point on the median AM, where M is on the side BC. If ar(ABC)=80 cm2 and ar(BMN)=12 cm2, then the area of ΔABN is
Answer» In $Δ A B C, N$ is any point on the median AM, where M is on the side BC. If $a r (A B C) = 80 c m^{2} a n d a r (B M N) = 12 c m^{2},$ then the area of $Δ A B N$ is