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. Choices:
A) 121 KM B) 242 KM C) 224 KM D) 112 KM E) 120 KM
AVERAGE SPEED = 2*21*24/21+24 = 22.4 KM/HR   TOTAL DIST = 22.4 * 10= 
<gadget id="calculator">22.4 * 10</gadget>
<output>224</output>
224 KM   DIST= SPEED * TIME   LET TIME TO TRAVEL THE FIRST HALF = X HR   THEN TIME = (10-X) HR   DIST COVERED IN FIRST HALF = 21X   DISTANCE COVERED IN SECOND HALF = 24(10-X)   242 KMUT DISTANCE COVERED 242 KMOTH EQUAL   21X = 24(10-X)   X=16/3   HENCE 21X = 21 * 16/3 = 7 * 16= 
<gadget id="calculator">7 * 16</gadget>
<output>112</output>
112 KM TOTAL DIST= 2 * 112= 
<gadget id="calculator">2 * 112</gadget>
<output>224</output>
224 KM   ANSWER 242 KM
<result>B</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.