The pre-stressed concrete induces artificially _____ stress in a structure before it is loaded
In an examination, a candidate is required to answer 5 questions in all, from 2 section having 5 questions each. What are the total number of ways in which a candidate can select the questions, provided that at least two questions are to be attempted from each section
X walks 6 km towards East from a point A and from the same point A, Y walks 8 km towards South. How far are the two friends from each other now