Answer:
first is some and second is all
Step-by-step explanation:
PLEASE GIVE BRAINLIEST!!!!!!!!!!
Surface area= 2(lw+lh+wh)
Plug in values
2(2*10+2*x+10*x)
2(20+2x+10x)
2(20+12x)
40+24x
40+24x=208
24x=168
x=7
Final answer: 7 cm
So it will be b proportional