Question

if p:q=2:3 and q:r=4:5 then r:p is equal to

Answer 1

$P:Q = 2:3 = 8:12 \\ Q:R = 4:5 = 12:15 \\ therefore \: \: P:Q:R = 8:12:15 \\ thus \: \: R:P = 15:8 \\ option \: (a)$