 <translate> The 5th graders planted 30 x 2 = 60 trees. Thrice the number of trees planted by the 5th graders is 60 x 3 = 180. So, the 6th graders planted 180 - 30 = 150 trees. Therefore, they planted a total of 30 + 60 + 150 = 240 trees. The final answer: 240. <yor> Àwọn ọmọ kíláàsì karùn-ún gbin igi ọgbọ̀n [30] sí méjì [60]. Ìlọ́po mẹ́ta iye igi táwọn ọmọ kíláàsì karùn-ún gbìn jẹ́ 60 x 3 = 180. Nítorí náà, àwọn ọmọ kíláàsì kẹfà gbin igi 180 - 30 = 150. Ìdí nìyẹn tí wọ́n fi gbin igi tó jẹ́ ọgbọ̀n + ọgọ́ta + àádọ́jọ = igba ó lé ogójì. Ìdáhùn tí wọ́n fún un níkẹyìn ni pé: 240. 