Find the ratio of the following:
`(a) 30` minutes to `1.5` hours           
`(b) 40 cm` to `1.5 m`
`(c) 55` paise to `Rs.1`                       
`(d) 500 ml` to `2` litres

Explanation

`a) 1 hr=60` min

`1.5` hrs`=1.5xx60=90` min

ratio`=30/90=1:3`
`b)1 m=100 cm`
`1.5 m=150 cm`
ratio`=40/150=4:15`
`c) 1` rs `= 100` paise ratio`=55/100=11:20`
`d)2 ` liters `= 2000 ml`
ratio`=500/2000=1:4`.