如果爬上树去采西瓜，3 粒要10分钟，
上下树要15 分钟，每6 粒就得下来放上车，
放1粒要2分钟！ 采30粒要多少时间？
快回答，非常容易的

If climb to pluck watermelon,3 will take 10 mins,
up & down from tree takes 15 mins,every 6 need put into car,
every watermelon takes 2 mins! Pluck 30 watermelon take how long?
Quick answer,very easy