question_answer

A student walks from his house at 4 km per hour and reaches his school late by 5 minutes. If his speed has been 5 km per hour then he would have reached 10 minutes early. The distance of the school from his house is

A)  \[\frac{5}{3}\]km          

B)         5 km  

C)  6 km                                    

D)  4 km