If a man walks 17 km in 5 hours, how long(in hrs) would he take to walk 20.4 km
6
5
8
None of these
Time taken to walk 17km=5hrs. Time taken to walk $1km=\dfrac{5}{17}hrs.$ Time taken to walk $20.4km=\dfrac{5}{17} \times20.4$
$=6 hrs.$