MBA Exam

Three circular rings of equal radii of 1cm each are touching each other.
a string runs all around the set of rings very tightly. what is the
minimum length of string required to bind all the three rings ?

1) 6/pi
2) 2(3+pi)
3) pi/6
4) cant be determined

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MBA Other Question
A, B, C, D and E are five taps. The capacity of B is 2 times that of A and the capacity of C is 3 times that of A. Capacities of D and E are 4 and 5 times that of A respectively. In the first case A, C and E act as input pipes and B and D act as output pipes. In the second case C, D and E act as input pipes and A and B act as output pipes. If A and D working together as input pipes can fill the tank in 4 hours, then what is the difference in time required to fill the tank in the first and second cases stated above?

1) 4.44 hrs
2) 3.33 hrs
3) 2.22 hrs
4) 1.11 hrs
5) 5.55 hrs
 On 1st March, Timon arrived in a new city andwas looking for a place to stay. He met a landladywho offered to rent her apartment at areasonable price but wanted him to pay the renton a daily basis. Timon had a silver bar of 31inches, and an inch of the silver bar was exactlyequal to a day’s rent. He agreed to pay an inch ofthe silver bar towards the daily rent. Timonwanted to make minimum number of pieces ofthe silver bar but did not want to pay anyadvance rent. How many pieces did he make?Plz tag me in solution.

1) 5
2) 8
3) 16
4) 20
5) 31