Question

a rectangular tank is 25m long 12m wide and 6m deep. what is the cost of plastering the inside of its walls and bottom floor at R26 per square meter

Answer 1

find perimeter and then multiply it with 26

Answer 2

Answer:

Rs.19344

Step-by-step explanation:

Length of tank(l) = 25 m

Width of tank (w)= 12 m

Height of tank (h)= 6 m

tank is in the shape of cuboid

Area of four walls and base = Lateral surface area of cuboid +Area of Base

                                             =$2(l+w)h+lw$

                                            =$2(25+12)6+25\times 12$

                                            =$744 m^2$

Thus the area which is needed to be plastering = 744 sq.m.

Cost of plastering 1 sq.m. = Rs.26

Cost of plastering 744 sq.m. = $26 \times 744$

                                               = $19344$

Hence the total cost is Rs.19344