A man walking at a speed of 8 km/hr covers a certain distance in 1 hour 45 minutes. If he runs at a speed of 10 km/hr, in what time he will cover the same distance?

84 min

Distance covered with 8km/hr speed: speed x time i.e. 8 x 1 \(\frac{ 45}{60 }\)

8 x 1 \(\frac{ 3}{4 }\)

8 x \(\frac{ 7}{4 }\) = 14km

Time for covering the same distance by running 10km/hr

Time = \(\frac{ Distance}{ Speed}\)

Time = \(\frac{ 14}{ 10}\) = 1.4 hour

1 hour  (60 min) + \(\frac{4 }{ 10}\) x 60 minutes = 84 minutes