 
 <translate> Kelly held her breath for 3 minutes, or 3 * 60 = 180 seconds. Brittany held her breath for 20 seconds less time than Kelly did, or 180 - 20 = 160 seconds. And Buffy held her breath for 40 seconds less time than Brittany did, or for 160 - 40 = 120 seconds.
The answer: 120. <ibo> Kelly gbochiri iku ume ya ruo nkeji atọ, ma ọ bụ 3 * 60 = 180 sekọnd. Brittany nọ na-ejide ume ya ruo sekọnd iri abụọ, bụ́ nke dị mkpirikpi karịa nke Kelly ji jide ume ya, ma ọ bụ 180 - 20 = sekọnd iri isii. Buffy nọ na-ejide ume ya ruo sekọnd iri anọ, nke na-erughị nke Brittany ji jide ume ya, ma ọ bụ sekọnd otu narị na iri isii - iri anọ = otu narị na iri abụọ. Azịza ya bụ otu narị na iri abụọ. 