MBA Exam

A rectangular piece of paper is folded in such a way that one pair of diagonally opposite vertices coincide. If the dimensions of the rectangle is 40 cm × 30 cm, then find the length of the crease (fold).

1) sqrt(2100) cm
2) 75 sqrt(3)
3) 37.5 cm
4) 60 sqrt(3) cm

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MBA Other Question
we are given with n things, total number of ways of selection?????(there is no given condition about how many objects we should select)

1) 2^n
2) n^2+1
3) n*n
4) n+1
 Each root of the equation ax^3 – 7x^2 + cx + 231 = 0 is an integer. One of the roots is -1/2 times the sum of the other two roots. What is the sum of all the possible values of a? [plz share ur valuable approach]

1) 17
2) -7
3) -17
4) None of these