# If X and Y Vary Directly, Find the Values of X, Y and Z: - Mathematics

Sum

If x and y vary directly, find the values of x, y, and z:

 x 3 x y 10 y 36 60 96 z

#### Solution

x and y are in direct variation

∴3/36="x"/60="y"/96=10/"z"

⇒3/36="x"/60,3/36="y"/96,3/36=10/"z"

x =3/36xx60, y =3/36xx96,

z =10xx36/3

⇒ x = 5, y = 8, z = 120

 x 3 5 8 10 y 36 60 96 120
Concept: Direct Variation
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 10 Direct and Inverse Variations
Exercise 10 (A) | Q 2 | Page 121