Question

(0.1×2)+(0.2×1)=(0.1×1.67)+(0.2×V2)

Answer 1

$(0.1 \times 2) + (0.2 \times 1) = (0.1 \times 1.67) + (0.2 \times {v}^{2} \\ \\ 0.2 + 0.2 = 0.167 + 0.2 {v}^{2}$

$0.4 = 0.167 + 0.2 {v}^{2} \\ \\ 0.2 {v}^{2} = 0.4 - 0.167 \\ \\ 0.2 {v}^{2} = 0.233$

${v}^{2} = \frac{0.233}{0.2} = 1.165 \\ \\ v = \sqrt{1.165}$

$v = 1.079$