Questions

‘Regret for’ needs to be replaced with ‘regret’ to make the sentence grammatically correct. This is because ‘regret’ is not followed by a preposition. Thus, the correct formation would be, ‘I regret using objectionable words against a man so mighty’.

Rabindranath Tagore called Subhash Chandra Bose as Desh Nayak for the first time.

Increase in volume = Volume of the cube = (15 x 15 x 15) cm3.

\Rise in water level = volume/area = (15 x 15 x 15)/(20 x 15) cm = 11.25 cm.

The sentence is grammatically and contextually correct. ‘His’ is the correct form of pronoun to be used. Thus, the correct formation would be, ‘He reached his destination at night’.