Very important question of mensuration including
very important concept of it.need solution!
Rd sharma class 10 maths exercise-15.4 mensuration.
we have to find the area of the playground given that
a play ground has the shape of a rectangle, with two
semi-circles on its smaller sides as diameters, added
to its outside. If the sides of the rectangle are
36m and 24.5m.
Given,
Length of rectangle = 36 m
Breadth of rectangle = 24.5 m
Radius of the semi-circle = breath/2 = 24.5/2 = 12.25 m
Now,
Area of the playground = Area of the rectangle + 2 x area of semi-circles
= l x b + 2 x ½ (πr2)
= (36 x 24.5) + (22/7) x 12.252
= 882 + 471.625 = 1353.625
Thus, the area of the playground is 1353.625 m2