If the rate of application per hectare is 3.00 kg a.i., the quantity of simazine WP (80% a.i.) required to be sprayed in 0.20 hectare area would be

Answer: Option B

Simazine is a selective herbicide used for the control of broadleaf weeds and annual grasses. It is recommended to be given in kg of a.i/ha or a.i %.
Formula:
$$\begin{array}{rl}& \text{Amount of herbicide}\\ & =\frac{\text{recommened rate}\times \text{spray area}}{\text{a}\text{.i }\%\text{ of WG/WP/Dust}}\times \text{100}\\ & \text{Amount of Simazine required}\\ & =\frac{\left(3\times 0.2\right)}{80}\times 100\\ & =0.75\text{ kg}\end{array}$$