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Mensuration — Maths STD 7 — Question

Maharashtra BoardEnglish MediumSTD 7MathsMensuration3 Marks
Question
A rectangular field is 50m by 40m. It has two roads through its centre, running parallel to its sides. The width of the longer and the shorter roads are 2m and 2.5-m-respectively. Find the area of the roads and the area of the remaining portion of the field.
✓

Answer

Length of field $(I)=50 m$
and breadth (b) $=40 m$

Width of road parallel to length $=2 m$
and width of road parallel to breadth $=2.5 m$
Area of roads $=50 \times 2+40 \times 2.5-2.5 \times 2=(100+100-5) m ^2=195 m^2$
and area of remaining portion $=50 \times 40-195=2000-195=1805 m^2$

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