question_answer

Mr. Bundda travels in his car and covers \[\frac{1}{4}\] part of his journey with 8 km/h \[\frac{3}{5}\] part with 6 km/h and remaining \[\frac{3}{20}\] part with a speed of 10 km/h. Find out his average speed during the whole journey.

A)  6.83 km/h        

B)  9 km/h

C)  4 km/h            

D)  8.5 km/h

E)  None of these