Question

y
∝
√
x

If
y
=
56
when
x
=
49
find,
x
when
y
=
72

Answer 1

Answer:

x = 81

Step-by-step explanation:

if :-

y  ∝ √x = kx

y = 56  x = 49

y = 8x

  = 8*7

  = 56

then

y = 8x

  = 8*9

  = 72

∴ x = 9²

     = 81