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Get access to the detailed solutions to the previous years questions asked in IIM IPMAT exam
Assumed work = 60 units (take this quantity as LCM for easy calculation)
T1 empties 60 units in = 30 min.
T1 & T2 empties 60 units in = 20 min.
Efficiency of T1 + T2 = 60/20 = 3 units/ min
Efficiency of T1 + Efficiency of T2 = Efficiency of T1 + T2
Efficiency of T2 + 2 = 3
Efficiency of T2 = 1 unit/min.
Time taken by T2 to empty tank = 60/1
= 60 mins