mrinal2100 wrote:

What is the volume of rectangular box B?

(1) Two adjacent faces of box B have areas of 16 and 10.

(2) Two opposite faces of box B each have an area of 40.

why a is wrong.we get the length,breath and height from the information given in A

because volume can be changed.

Area 16 and 10.

So 8 × 2 and 5 × 2 , so 2 is the common side and the rest two are other two sides , so these three are length, width and height. finally volume = 5×8×2=80

but look, again area 16 and 10,

so 4×4 and 5/2 × 4.

now volume= 4 × 4 × 5/2 = 40.

so volume can be changed. we don't know what the value of length width and height really are....

st(2) confirms that..

thats why (C) not (A)

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Asif vai.....