Respuesta :

5. total time taken = 3hrs

    speed = 30km/hr

total distance travelled = 30 * 3= 90km

6. total time taken = 1.5hrs = 1  1/2 hrs

   speed = 70 miles/hr

  distance travelled in 1/2 hrs = 1/2 * 70 = 35 miles

total distance travelled = 3/2 * 70 = 3 * 35 = 105 miles

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