A motorist covers 177.5 km in 2 hours. On the open road he averages 105 km/h
and 40 km/h in urban areas. How many minutes did he take to pass through the
urban areas?
-- James.
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A motorist covers 177.5 km in 2 hours. On the open road he averages 105 km/h
and 40 km/h in urban areas. How many minutes did he take to pass through the
urban areas?
-- James.
Let us assume that the motorist took x hours to cross urban areas. Therefore he travelled for 2-x hours on open road.
Therefore (x *40 + (2-x)*105) = 177.5
=> 40x+210-105x = 177.5
=> 65x = 32.5
=> x = 0.5 hours = 30 mins
The motorist took [B]30 mins[/B] to pass through urban areas.
-- James