Question 995139

A student starting from his house walk at a speed of 2.5 km per hour and reaches his school 6 minute late. Next day at the same time he increases his speed by 1 km per hour and reaches 6 minute early. The distance between his school and house is?
A)3½ km
B)4 km
C)1¾ km
D)6 km
<pre>Duplicate.....see problem # 994570
Distance: {{{highlight_green(1.75)}}} km