In a rhombus ABCD, AO=10 cm and BO=12 cm. How much is the area of this rhombus?

**(A) **240 **(B) **350

**(C) **400 **(D)** 480

**(E)** None of the above

Diagonals of rhombus bisect each other which means that AO=CO and BO=DO.

Therefore, cm

And cm

Area of rhombus

Hence, the answer is **(A)**.