Question 14
Mr. Zack walks to school every day. 10 trees are planted regularly all the way between his house and his school. He takes a half-a-minute break in the shade of every single tree. It takes him a total of 12 minutes to go from his house to the fifth tree. How long does it take him to get to school?
Editorial grading convention: the 10 trees are strictly between house and school; all 11 gaps, including the end gaps, are equal. Walking speed is constant. The 12 minutes ends on arrival at tree 5 before its rest, and the full trip ends on arrival at school.
Editorial grading convention: the 10 trees are strictly between house and school; all 11 gaps, including the end gaps, are equal. Walking speed is constant. The 12 minutes ends on arrival at tree 5 before its rest, and the full trip ends on arrival at school.