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Suggested answer:

1 – 3/11 = 8/11

12/60 hr x 80 km/hr = 16 km

Remaining distance of  8/11 journey is 16 km.

Whole journey will be,

16 km / 8 x 11 = 22 km

a) Total distance for the whole journey is 22 km.

3/11 x 22 km = 6 km

If speed is 60 km/hr, ie. 60 min = 60 km, every min travel 1 km.

6km => 6 mins

6 min + 12 min = 18 min

b)Total time taken for the whole journey is 18 min.

 

 

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