Answer:
E = 56
Step-by-step explanation:
Given that E varies directly with then the equation relating them is
E = k ← k is the constant of variation
To find k use the condition E = 40 when C = 25
k = = = = 8, thus
E = 8 ← equation of variation
When C = 49, then
E = 8 × = 8 × 7 = 56
6
4/5=80%
1/8=12.5%
80÷12.5=6.4
Width = area / length
Width = 77 / 35
Width = 2.2 meters