In Fig. 9.19, EFGH is a parallelogram, a...

In Fig. 9.19, EFGH is a parallelogram, altitudes FK and FI are 8 cm and 4cm respectively. If EF = 10 cm, then area of EFGH is

A

`20 cm^2`

B

`32cm^2`

C

`40 cm^2`

D

`80 cm^2`

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