MBA Exam

A golf ball has diameter equal to 4.2 cm. Its surface has 200 dimples each of radius 2 mm. Calculate the total surface area which is exposed to the surroundings assuming that the dimples are hemispherical…….

1) 78 cm<sup>2</sup>
2) 80.58 cm<sup>2</sup>
3) 81.72 cm<sup>2</sup>
4) 83.60 cm<sup>2</sup>
5) none of these

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MBA Other Question
Two white squares and a black square have to be chosen from a chess board such that no two of them are in the same row or column. In how many ways can the selection be made?

1) 6400
2) 6144
3) 6688
4) 6912
 The LCM of three positive integers X, Y and Z is 119^2. Find the total number of ordered triplets (X, Y and Z).

1) 400
2) 361
3) 289
4) 225