A man cycles 20 km from A to B. If he increases his speed by 3 km/h, he saves 90 minutes on the journey. Find his original speed in km/h.​

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis