Raman drives from his home at the speed of 35 km/h and reaches his college 27 minutes late.  The next day he increases his speed by 10 km/h, yet he is late by 15 minutes.  How far is his college from his home?

31.5 km

Distance = [\(\frac{S_1 S_2}{S_1 - S_2}\)] × Time Difference

              = [\(\frac{35\;×\;45}{10}\)] × \(\frac{27\;-\;15}{60}\)

              = 31.5 km