Find the ratio of the following: (a) Speed of a cycle 15 kmper hour to the speed of scooter 30 kmper hour. (b) 5 m to 10 km (c) 50 paise to Rs. 5

In this question, first we have to check whether the elements involved in the required ratio have the same units.
a) Speeds of scooter and cycle, both have units "km per hour".
Hence, Ratio = Speed of cycle / Speed of scooter = 15 km per hr / 30 km per hr = 1/2
b) 5 m and 10 km.
We know, 1 km = 1000 m
∴ 10 km = 10000 m
Ratio = 5 m / 10000 m = 1/2000
c) 50 paise and Rs. 5
We know, Rs. 1 = 100 paise
∴ Rs. 5 = 500 paise
Ratio = 50 paise / 500 paise = 1/10