The lengths of the sides of a triangle are 5 m, 1.2 decametre and 130 dm. Then its area is ______.
A 24 m2
B 30 m2
C 48 m2
D 40 m2
The lengths of the sides of a triangle are 5 m, 1.2 decametre and 130 dm. Then its area is ______.
A 24 m2
B 30 m2
C 48 m2
D 40 m2