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1. In water, the direction along the stream is called downstream. And the direction against the stream is called upstream. 2. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then Speed downstream = (u + v) km/hr ...
A database is an organized collection of data, generally stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal design and modeling techniques. The purpose of this online test is to help you evaluate your...
Important events Today 07.09.2019 प्रधानमंत्री नरेंद्र मोदी ने कहा-चंद्र मिशन, भारत की सर्वश्रेष्‍ठ प्रतिभा का प्रदर्शन है। इसकी ...