1.

The shape of a garden is rectangular in the middle and semi circular at the ends as shown in the diagram. Find the area and the perimeter of this garden [Length of rectangle is `20-(35+35)` metres].

Answer» area = area of rectangle part `+` area of semicircle
`= 13 xx 7 + pi/2 xx (3.5)^2 + pi/2 xx (3.5)^2`
= `91 + pi xx 49/4`
= `91 + 22/7 xx 49/4`
`= (182+ 77)/2`
`= 259/2 m^2`
perimeter= `2 (l ) + 2 (pi r)`
`= 2(13 ) + 2*22/7* 7/2`
`= 26 + 22 = 48 m`
answer


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