Jin Seng drove from town A at 09 15 hours and stopped along the way for lunch at 12 30 hours.He spent 45 minutes for lun

Jin Seng drove from town A at 09 15 hours and stopped along the way for lunch at 12 30 hours.He spent 45 minutes for lunch and drove for another 60 minutes to arrive at town B.The distance between town A and B is 900km.
       (a) Find his average speed in km/h
       (b) On his return journey,he drove on the same route continuously without stopping at 60km/h .How long will he take to arrive at town A
2.On a map,a length of 2cm represents an actual distance of 400 m.Calculate the
    (a) the actual distance,in kilometers,represented by 18cm
   (b) the area on the map,in square centimeters,given that the actual area is (2km square)