Question

A man complete a journey in 10 hours. he travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. find the total journey in km. select one:

a. 220 km

b. 230 km

c. 234 km

d. 224 k

Answer 1

Let the distance of the first half be 1/2x or x/2
Let the distance of the secondhalf be x/2.
Let the total distance be x.

Time = distance
---------------
Speed

1/2x. 1/2x
= ------- + ------- = 10
21. 24
$= \frac{x}{21} + \frac{x}{24} = 20$

$= \frac{24x + 21x}{504} = 20$
$45x = 10080$
$x = \frac{10080}{45}$
$x = 224 \: km$

Hence the answer is 224 km.....pls mark my answer as brainliest answer