the length of a rectangle blackboard is 3 times its width . if the width bis 1.5 m, find its area . also find the cost of paintin

1 thought on “the length of a rectangle blackboard is 3 times its width . if the width bis 1.5 m, find its area . also find the cost of paintin”

1. Answer:

   6.75m^2; ₹27

   Step-by-step explanation:

   let width be x

   then, length=3x

   width=1.5m

   then, length= 1.5*3 m

   =4.5 m

   area= l*b

   = 4.5m*1.5m

   =6.75 m^2

   cost of painting the blackboard= ₹(6.75*4)

   = ₹ 27

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