Rachit took 4 hours to complete the last 1/4 part of the journey at an average speed of 55 km/hr his average speed for the whole journey is 60km/hr how long will it take to cover the first 3/4 part of the journey
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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 × 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.
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 × 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.
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Answer:
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. so, time taken to complete first 3/4 part of the journey is (44/3) - 4 = 32/3 hrs.Nov 6, 2018
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