Question

Plz solve this further briefly

Answer 1

$1.5 = \frac{3 \times 10 {}^{8} }{c} , c≠0 \\ 1.5c = c \times \frac{3 \times 10 ^{8} }{c} \\ 1.5c = 3 \times 10^{8} \\ c = 2 \times 10^{8}, c≠0 \\ c = 2 \times {10}^{8} \\ or \: c = 200000000$