A boy leaves his house at 9.30 a.m. for his school. The school is 2 km away and classes start at 10.00 a m. If he walks at a speed of 3 km/h for the first kilometre, at what speed should he walk the second kilometre to reach just in time?
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3km in 1hour
1km in 60mins /3
=20 mins
10 mins left for 10:00 am
10mins = 1km
speed = 6kmph
1km in 60mins /3
=20 mins
10 mins left for 10:00 am
10mins = 1km
speed = 6kmph
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