Question

Find the ratio p:r if p:a=1:2, a:b=2:3, b:c=5:1, c:r=3:2​

Answer 1

Answer: 2.5

`(p)/(a)=(1)/(2) => a=2p\\\\(a)/(b)=(2)/(3)=> b=(3)/(2)a=3p\\\\(b)/(c)=(5)/(1)=>c=(1)/(5) b=(3p)/(5)\\\\(c)/(r)=(3)/(2)=>(3p)/(5r)=(3)/(2)=>(p)/(r)=(3)/(2):(3)/(5)=2.5`

Explanation: