If you are a genius then solve the mathematical problem?
if a boat goes 7km upstream in42 minutes and the speed of the stream is 3 kmph,then the speed of the boat in still water is???
If you are a genius then solve the mathematical problem? | Ecencyআমি শুনেছি সেদিন - মৌসুমি ভৌমিকa-7 ·
angeluxx ·