Test Preparation on GATE Mechanical Engineering

Going by the _________ that many hands make light work, the school _______ involved all the students in the task.? The words that best fill the blanks in the above sentence are-

Her _______ should not be confused with miserliness; she is ever willing to assist those in need.? The word that best fills the blank in the above sentence is

Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many minutes would it take for 100 machines to make 100 toys?

A rectangle becomes a square when its length and breadth are reduced by 10 m and 5 m, respectively. During this process, the rectangle loses 650 m2 of area. What is the area of the original rectangle in square meters?