Rakesh started his journey of 42 km from x to y with a speed of 60 km/hr. But after every 10 minute he increases his speed by 6 km/hr. How much time did he take to reach y?

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Solution

Distance traveled in 1st 10 mins = $60 k m / h \times (\frac{1}{6}) h r = 10 k m$
Distance traveled in 2nd 10 mins = $66 k m / h \times (\frac{1}{6}) h r = 11 k m$
Distance traveled in 3rd 10 mins = $72 k m / h \times (\frac{1}{6}) h r = 12 k m$
Therefore, distance yet to be covered = 9km
$T i m e = \frac{9 \times 60}{72} = 7 m i n s$
Therefore, total time = 10+10+10+7 = 37 mins

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Rakesh started his journey of 42 km from x to y with a speed of 60 km/hr. But after every 10 minute he increases his speed by 6 km/hr. How much time did he take to reach y?

Distance traveled in 1st 10 mins = 60km/h×(16)hr=10 km Distance traveled in 2nd 10 mins = 66km/h×(16)hr=11 km Distance traveled in 3rd 10 mins = 72km/h×(16)hr=12 km Therefore, distance yet to be covered = 9km Time=9×6072=7 mins Therefore, total time = 10+10+10+7 = 37 mins