Question

A room is 5 m long 3.5 m wide and 3 m high. Find the cost of cementing the inner portion of the walls at Rs.20 per square meter

Answer 1

ANSWER:

10500 rupees

Step-by-step explanation:

inner portion = length × breadth × height

= 5m × 3.5 × 3m

=52.5 m

cementing for 1m = 20 rupees

cementing for 52.5 m = 20×52.5 =10,500 rupees

Answer 2

Answer:

₹1370

Step-by-step explanation:

l = 5m

b = 3.5m

h = 3m

Area to be cemented = LSA of cuboid + area of ceiling

                                    = 2(l+b)h + lb

                                    = 2 (5 + 3.5) 3 + 5 * 3.5

                                    = 6 * 8.5 + 17.5

                                    = 51 + 17.5

                                     = 68.5 m²

Cost = 20 * 68.5

        = ₹1370