The ratio of the speeds of two scooters is 9 : 5. If the second scooter nuns 75 km in 6 hours, then what is the speed (in km/h) of the first scooter?
Answer & explanation
Correct answer: option 2
Distance = Speed × Time
Speed = \(\frac{DIstance}{Time}\)
Speed of 2nd scooter = \(\frac{75}{6}\) = \(\frac{25}{2}\) km/h
Now ,
Ratio of Speed of 1st scooter to 2nd scooter = 9 : 5
According to question ,
5R = \(\frac{25}{2}\)
1R = \(\frac{5}{2}\)
9R = 9 × \(\frac{5}{2}\) = 22.5
So , speed of 1st scooter is 22.5 km/h