 
 <translate> 6 models wearing 2 sets of bathing suits, or a total of 6 * 2 = 12 trips wearing bathing suits. 6 models wearing 3 sets of evening wear, or a total of 6 * 3 = 18 trips wearing evening wear clothes. Altogether, there will be 12 + 18 = 30 trips up and down the runway. At 2 minutes per trip, all of the trips will take 30 * 2 = 60 minutes to complete.
Therefore, the answer is 60. <ibo> 6 ndị na-eyi uwe eji egwu mmiri abụọ, ma ọ bụ ngụkọta nke 6 * 2 = njem 12 na-eyi uwe eji egwu mmiri. 6 ndị na-eyi uwe mgbede atọ, ma ọ bụ ngụkọta nke 6 * 3 = 18 njem na-eyi uwe mgbede. N'ozuzu, a ga-enwe njem 12 + 18 = njem 30 n'elu na n'ala. Na nkeji 2 kwa njem, njem niile ga-ewe 30 * 2 = 60 nkeji iji mezue. N'ihi ya, azịza ya bụ 60. 