After cycling 18 km at an average speed of
12 km/h, Lucy finds that she still has to cycle
55% of the total distance. She then completes
the rest of her journey at an average speed of
16.5 km/h. Find
(a) the total distance of her journey,
(b) the remaining distance she needs to
cycle to complete the journey,
(c) the time taken for the whole journey,
(d) the average speed for the whole journey.
Answers
the total distance of her journey = 40 km , Remaining distance = 22 km the time taken for the whole journey = 170 mins ( 2.833 hrs), Average Speed of Whole journey = 14.12 km/hr
Step-by-step explanation:
After cycling 18 km at an average speed of 12 km/h
=> time Taken = 18/12 = 1.5 hr = 90 Mins
she still has to cycle 55% of the total distance
=> Distance Covered = 100 - 55 = 45%
D = Total Distance
=> (45 /100) D = 18 km
=> D = 40 km
the total distance of her journey = 40 km
Remaining distance = 40 - 18 = 22 km
completes the rest of her journey at an average speed of 16.5 km/h
Time taken = 22/16.5 = 1.33 hr = 80 mins
Time taken for whole journey = 90 + 80 = 170 mins = 2.8333 hrs
Average Speed of Whole journey = 40/(170/60) = 14.12 km/Hr
Learn More:
Amit travelled from A to B at an average speed 80km/hr. He travelled ...
https://brainly.in/question/12562414
a boy travels d distance towards north with speed v1 and then takes ...
https://brainly.in/question/10656050
Answer:
2/5/6 c answer should be