Question

17. The density of oil is 0.8 g/cm3. The height h of the
column of oil shown is
20.
2 cm
oil
water
(1) 6 cm
(3) 8 cm
(2) 4.6 cm
(4) 10 cm​

Answer 1

The height h of the column of oil shown is 10 cm

Option (4) is correct

Explanation:

At the interface of the oil and water

The hydrostatic pressure due to h cm column of oil and h-2 cm colum of water will be equal

Therefore,

$\rho_{Oil}gh=\rho_wg(h-2)$

$\implies 0.8h=1\times (h-2)$

$\implies 0.2h=2$

$\implies h=10$ cm

Hope this answer is helpful.

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