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
Choose the correct choice:
A) 200 Km  B) 222 Km  C) 224 Km  D) 248 Km  E) None of these
Explanation:   Let time taken to travel the first half = x hr   Then time taken to travel the second half = (10 - x) hr   Distance covered in the the first half = 21x [because, distance = time*speed]   Distance covered in the the second half = 24(10 - x)   Distance covered in the the first half = Distance covered in the the second half   So,   21x = 24(10 - x)   =&gt; 45x = 240   =&gt; x = 16/3   Total Distance = 2*21(16/3) = 224 Km [multiplied by 2 as 21x was distance of half way]   Answer: 224 Km
<result>C</result>
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