The speed of three cars in the ratio 5 : 4 : 6. The ratio between the time taken by them to travel the same distance is	Select:	A) 5 : 4 : 6	B) 6 : 4 : 5	C) 12 : 15 : 10	D) 10 : 12 : 15	E) None
Sol.   Ratio of time taken = 1 / 5 : 1/4 : 1/6 = 12 : 15 : 10.   Answer 12 : 15 : 10
<result>C</result>
The speed of three cars in the ratio 5 : 4 : 6. The ratio between the time taken by them to travel the same distance is