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Discussion :: Time and Distance

1.  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.
2.  A. 220 km B. 224 km C. 230 km D. 234 km

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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