Question

Tia has a rectangular wooden board the length is thrice of it's width. If the width of board is 120 cm, find the cost of farming it at a rate of rupees 5 for20 cm?

Answer 1

Answer:

₹ 10,800

Step-by-step explanation:

Given :- l = 3b    

             b = 120 cm

SOLUTION:-   ⇒ l = 3 X 120 = 360 cm

AREA OF RECTANGLE = l X b

                                      = 360 X 120

                                       = 43,200 cm²

COST OF FARMING:-  for 20 cm² = ₹ 5

                                   ⇒ cost = 43,200 X 5

                                                        20

                                                = 2160 X 5

                                                = ₹10,800