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If p, q, r, s and t represent length, br...

If p, q, r, s and t represent length, breadth, height, surface area and volume of a cuboid respectively, then what is `1/p + 1/q +1/r` equal to ?

A

`s/t`

B

`(2t)/s`

C

`s/(2t)`

D

`(2s)/t`

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