Question

The length of a rectangular blackboard is three times its width. If the width is 15 m, find its

area. Also find the cost of painting the blackboard at the rate of C 55 per sq m.​

Answer 1

Answer:

Area = 675 m^2

Cost = 37125 m^2

Step-by-step explanation:

w=15 m

l=15*3= 45 m

area=l*b

       =45*15= 675 m^2

Rate=55 rupees/m^2

Cost= 55*675 = 37125 rupees