A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?
____ jointly launched International Solar Alliance (ISA) at Conference of Parties (CoP21) Climate Conference held in Paris, France on 1st December 2015.
Indian Government is hopeful of bringing at least one crore subscribers by March 2018 under the Atal Pension Yojana (APY). What is the age limit for APY?