Aeron, Ben, John drive at the constant speed. The average speed of Ben is 3/4 of Aeron. The ratio of John's average speed to Ben's average speed is 13:15. If Aeron's average speed is 60 km/h. What is John's average speed? Give the answer to the nearest whole number.
(1) 65 km/h
(2) 87 km/h
(3) 55 km/h
(4) 42 km/h
It's actually
Aeron, Ben, John drive at the constant speed. The average speed of Ben is 5/4 of Aeron. The ratio of John's average speed to Ben's average speed is 13:15. If Aeron's average speed is 60 km/h. What is John's average speed? Give the answer to the nearest whole number.
(1) 65 km/h
(2) 87 km/h
(3) 55 km/h
(4) 42 km/h
+237 Let, John's average speed = 13x km/h.
Ben's average speed = 15x
Given, Ben's average speed = 5/4 * 60 = 75
15x = 75
=> x = 5
John's average speed = 13 * 5 = 65 km/h.
(1) 65 km/h.
