Time and Distance - Arithmetic Aptitude Questions and Answers

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Discussion :: Time and Distance

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.

220 km

224 km

230 km

234 km

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Answer : Option B

Explanation :

$\frac { (1/2)X } { 21 }$ + $\frac { (1/2)X } { 24 }$ =10

$\frac { X} { 2 1}$ + $\frac { X} { 2 4}$ =20

15x = 168 x 20

x = $[\frac { 168*20 } {15 }]$ =224km

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