CSAT 2021 | DDSQ Nov 16 | Civil Services | IAS | UPSC | State PSC | SSC | IBPS | NDA | CDS | Railways

A vessel full of water weighs 40\:kg. If it is one-third filled, its weight becomes 20\:kg. What is the weight of the empty vessel?

(a) 10\:kg
(b) 15\:kg
(c) 20\:kg
(d) 25\:kg