Question

if x/y=(2/5)-³×(15/8)-³, then find the value of (x/y)-¹​

Answer 1

Answer:

x:y=2:5,y:z=15:8,z:w=3:2

∴

y

x

×

z

y

×

w

z

=

5

2

×

8

15

×

2

3

=

8

9

∴x:w=9:8

∴ The triplicate ratio of 9:8 is 9

3

:8

3

=729:512