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.

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.

[A].	220 km
[B].	224 km
[C].	230 km
[D].	234 km

Answer: Option B

Explanation:

(1/2)x	+	(1/2)x	= 10
21		24

	x	+	x	= 20
	21		24

15x = 168 x 20

x =		168 x 20		= 224 km.
		15

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