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Mensuration - I (Perimeter and Area of Rectilinear Figures) — Maths STD 7 — Question

Maharashtra BoardEnglish MediumSTD 7MathsMensuration - I (Perimeter and Area of Rectilinear Figures)3 Marks
Question
A rectangular field is 48m long and 20m wide. How many right triangular flower beds, whose sides containing the right angle measure 12m and 5m can be laid in this field?
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Answer

We have,
Length of the rectangular field $=48 m$
Breadth of the rectangular field $=20 m$
Area of the rectangular field $=$ Length $\times$ Breadth $=48 m \times 20 m=960 m^2$
Area of one right triangular flower bed $=\frac{1}{2}(12 m \times 5 m)=30 m^2$
Therefore,
Required number of right triangular flower beds $=\frac{960 m^2}{30 m^2}=32$

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