A man completes a journey in 10 hours. he travels first half of the journey at the rate of 21 km/h and second half at the rate of 24 km/h. find the total journey in km.
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(1/2)x/21+(1/2)x/24= 10
=> x/21+x/24= 20
=> 15x = 168 x 20
=> x =(168 x 20)/15= 224 km.
=> x/21+x/24= 20
=> 15x = 168 x 20
=> x =(168 x 20)/15= 224 km.
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