Question

Inside a rectangular garden 21 m long and 17 m wide, a 1.5 m
margin has been left for planting tuberoses, and grass has been planted in the rest of the area.
If 3 tuberose plants can be planted in 1 m², how many tuberose plants can be planted in the garden?​

Answer 1

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first take the area of garden=21 × 17= 357 m^2

then the area covered by margins=17× 1.5(along width)=25.5

so total area covered by margins along the width is 51.0

area covered by margins along the length=21×1.5=31.5

total area covered along the length=63.0

minus the area of the squares made due to intersecting of lines=1.5×1.5=2.25

thus area to be subtracted=2.25×4=9

total area covered by margins=(63+51)-9=105 m^2

tuberose to be planted=3×105=315