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Two girls sta...

Question

Two girls starting from the same place walk at a rate of 10 kmph and 11 kmph respectively. What time will they take to be 17 km apart, if they walk in the same direction?

17 hrs

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16 hrs

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15 hrs

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18 hrs

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19 hrs

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Solution

The correct option is A
17 hrs

The relative speed of the girls = 11 kmph - 10 kmph = 1 kmph

Distance between them is 17 km

Time = $\frac{17}{1}$ = 17 hrs

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Two girls starting from the same place walk at a rate of 10 kmph and 11 kmph respectively. What time will they take to be 17 km apart, if they walk in the same direction?

The correct option is A 17 hrs The relative speed of the girls = 11 kmph - 10 kmph = 1 kmph Distance between them is 17 km Time = 171 = 17 hrs

The correct option is A
17 hrs

The relative speed of the girls = 11 kmph - 10 kmph = 1 kmph

Distance between them is 17 km

Time = $\frac{17}{1}$ = 17 hrs