Question

inside a rectangular garden 21 m long and 17 m wide, a 1.5m 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 1m^2, how many tuberose plants can be planted in the garden?

Answer 1

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