Question

Rachit took 4 hours to complete the last 1/4 part of a journey at an average speed of 55 km/hr. His average speed for the whole journey is 60 km/hr. How long will it take to cover the first 3/4 part of the journey? ​

Answer 1

Answer:

Let length of whole journey is L a/c to question, Rachit took 4 hour to complete the last 1/4 part of the journey at an average speed 55 km/h. e.g., he travelled L/4 length in 4 hour with speed 55km/h so, 55 = (L/4)/4 L= 55 x 16 = 880 km

hence, length of whole journey is 880km

he completed whole journey with speed 60km/h then, time taken to complete whole journey = 880/60 = 44/3 hrs

so, time taken to complete first 3/4 part of the journey is (44/3) - 4 32/3 hrs.

Answer 2

Answer:

yeah! the answer is alredy given