Problem $1$:

Determine the composite SCS runoff curve number for a $600-$acre basin that is entirely in Soil Group B$.$

The land use is $50\%$ straight$-$row crops under poor conditions, and $50\%$ meadow under good conditions.

Use the following values in your solution,

Table $4\mathrm{.}11$ Straight $-$ Row Crops in Poor Condition $CN=81$

Table $4\mathrm{.}11$ Meadow in Good Condition $CN=58$

Problem $2$:

For the composite curve number found in Problem $3,$ estimate the amount of runoff $($in inches$)$ if the direct

rainfall is $20in.$