Given in the accompanying sketch is a cross-section which has been plotted from soundings taken along a range line across a lake. The cross- section is divided into a series of trapezoids and triangles whose dimensions are indicated in the sketch. Determine the total area of the cross-section (in sq m) without disregarding the areas in the end zones. (Type your answer using 2 decimal places, numerical value only, no need to include the units). L 34.5m (Langth of Cross Section) 3.5 3.9 4.2 4.4 5.3 4.0 5.0 4.2 LWE RWE 3.7m 3.9m 4.6m Om 5.7m 6.2m

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Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.