Question

the length of the rectangular lot is 4 m longer than the width.if the area of the lot is 12 m², what will be the length and the width of the rectangular lot?​

Answer 1

$\fbox{ ANSWER }$

Area of the cross-section of the wire (A) = 4 × 10⁻⁸ m²

Resistivity (ρ) = 10 × 10⁻⁸ Ωm

Resistance (R)= 25Ω

Length of the wire (L)=?

Now,

R = ρ × L/A

⇒L = R × A/ρ

⇒L = 25 × 4 × 10⁻⁸/10 × 10⁻⁸

⇒L = 25 × 4/10 (10⁻⁸ ÷ 10⁻⁸ = 1)

⇒L = 100/10

⇒L = 10m