Question

If x varies directly to y and y varies
directly to z and x = 12 when z=15
and y=10 find & when z=30​

Answer 1

Answer:

x (yz) directly proportion

x=kyz

12= k×10×15

k=0.08

y (z) directly proportion

y=kz

y=0.08×30

y=24

x =kya

x=0.08×24×30

x=5.76