The diagonal of a rhombus are 70 m and 160 m. Its area is:
Select:
A) 1940
B) 4800
C) 5600
D) 5200
E) 5000

Rationale: "area of the rhombus = 1 / 2 d 1 d 2 = ( 1 / 2 ã — 70 ã — 160 ) cm ( power ) 2 = 70 ã — 80 = 5600 cm ( power ) 2 answer is c ."
Answer: C