Do you know Mosquito-repellent incense as the picture ? In Japan, this is a traditional item and mainly people use it in summer to kill mosquitoes using inside and outside at home. It is a kind of incense, and you put the fire one of end. Mosquito could be killed by the smoke from it.
Question is with two 'Mosquito-repellent incense', please find the way to measure for 15 minutes. This type of Mosquito-repellent incense takes 1 hour to complete to burn out. When you find the answer, please post your answer to post in the comment column.
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