Question

A man completes a journey in 10 hours he travel 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 .​

Answer 1

Step-by-step explanation:

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)

=> 45x = 240

=> x = 16/3

Total Distance = 2*21(16/3) = 224 Km [multiplied by 2 as 21x was distance of half way]

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Answer 2

Step-by-step explanation:

$(1/2)x+24(1/2)x=10</p><p>⇒21x+24x=20</p><p>⇒15x=168×20</p><p>⇒x=(15168×20)=224km</p><p></p><p>$

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