Question

Charles is going campin with his family. His campsites 7/8 miles away. They walk at a steady speed of 1 1/2 mi/hr. How many minutes will it take them to get to the campsite?

Answer 1

$x-\ travel\ in\ minutes\\\\From\ proportion:\\\\1.5\ \ \ \ -\ \ \ \ 60\\\frac{7}{8}\ \ \ \ \ \ -\ \ \ \ x\\\\1.5x=60\cdot\frac{7}{8}\\\\1.5x=\frac{420}{8}\\\\1.5x=\frac{105}{2}\\\\1.5x=52.5\ \ \ \ \ |:1.5\\\\x=35\ minutes$