question_answer

The distance between two places R and S is 42 km. Kanika starts from R with a uniform speed of 4 km/h towards S and at the same time Yashika starts from S towards R also with some uniform speed. They meet each other after 6 hours. The speed of Yashika is

A)  6 km/hour                    

B)  8 km/hour

C)  18 km/hour                  

D)  20 km/hour

E)  None of these