Rate of the reaction, $\text{A}\stackrel{ }{\to }$products is  $0.5 {\mathrm{MS}}^{-1}$ at time t = 15 sec, then rate at time t = 5 sec will be$\left(\text{in }{\mathrm{MS}}^{-1}\right)$

$\text{A}\stackrel{ }{\to }$ products Rate $=0.5 {\mathrm{MS}}^{-1}$ at t = 15 sec  t = 5 sec $\Rightarrow$ rate = ? 

At any time r $\text{α}$ [reactants]
Time  $\text{α\hspace{0.17em}}\frac{\text{1}}{\left[\text{reactant}\right]}$

T = 15           R = 0.5
T = 5             R = > 0.5