Question

if the compound ratio of 5:8 and 3:7 is 45:x .Find x

Answer 1

Ans: 168

step by step procedure:

compound ratio of a:b and c:d is ac: bd

compound ratio of 5:8 and 3:7 is =

5x3 : 8x7 = 45 : x

15 : 56 = 45 : x

15/56 = 45/x

cross multiply. 15 x = 45 x 56

x = 45 x. 56

15

x=3 x 56 = 168