Decline of the caste system in India :
(i) Efforts of social reformers like Phule, Gandhiji, Ambedkar against caste system have helped to promote a casteless society.
(ii) Economic development has reduced...
(c) Container is filled in 30 min.
∴ Container is half-filled in (30 – 5) = 25 min
Hence, time taken for the container to be one-fourth
filled = (25 – 5) =...