Question

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 painting the blackboard at the rate of 4 per sq .m​

Answer 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