A woman completes a journey in 20 hours. She travels first half of the journey at the rate of 42 km/hr and second half at the rate of 48 km/hr. Find the total journey in km.

784 km

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816 km

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896 km

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864 km

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880 km

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Solution

The correct option is C
896 km

$\frac{0.5 x}{42} + \frac{0.5 x}{48} = 20 \frac{x}{42} + \frac{x}{48} = 40 15 x = 336 \times 40 x = \frac{(336 \times 40)}{15} = 896 k m$

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A woman completes a journey in 20 hours. She travels first half of the journey at the rate of 42 km/hr and second half at the rate of 48 km/hr. Find the total journey in km.

The correct option is C 896 km 0.5x42+0.5x48=20x42+x48=4015x=336×40x=(336×40)15=896km

The correct option is C
896 km

$\frac{0.5 x}{42} + \frac{0.5 x}{48} = 20 \frac{x}{42} + \frac{x}{48} = 40 15 x = 336 \times 40 x = \frac{(336 \times 40)}{15} = 896 k m$