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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
Correct Answer:
224 km
Explanation:
(1/2)
x
+
(1/2)
x
= 10
21
24
⟹
x
+
x
= 20
21
24
⟹ 15
x
= 168 x 20
⟹
x
=
❨
168 x 20
❩
= 224 km.
15
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