Answer:
u=25.6
Step-by-step explanation:
6.4=u/4
by cross multiplication
6.4×4=u
25.6=u
i hope this will help you :)
6.4 = u/4
multiply 4 on each side
6.4 x 4 = 26.4
u/4 x 4 = u
26.4 =u
u = 26.4
Hope this helps
