Question

How much tape is required to measure all around a rectangular table cloth measuring 5m and 4m?

Answer 1

Answer:

9 m long tape is required for measuring the table cloth

Answer 2

Answer:

$\red\bigstar$ 18m of tape is required to measure all around a rectangular table cloth measuring 5m and 4m.

SOLUTION

Length (l) of the table cloth = 5m.

Breadth (b) of the table cloth = 4m.

$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\multiput(0,0)(5,0){2}{\line(0,1){3}}\multiput(0,0)(0,3){2}{\line(1,0){5}}\put(0.03,0.02){\framebox(0.25,0.25)}\put(0.03,2.75){\framebox(0.25,0.25)}\put(4.74,2.75){\framebox(0.25,0.25)}\put(4.74,0.02){\framebox(0.25,0.25)}\multiput(2.1,-0.7)(0,4.2){2}{\sf\large 5m}\multiput(-1.4,1.4)(6.8,0){2}{\sf\large 4m}\put(-0.5,-0.4){\bf A}\put(-0.5,3.2){\bf D}\put(5.3,-0.4){\bf B}\put(5.3,3.2){\bf C}\end{picture}$

The measure of tape required to measure all around the rectangular table cloth is equal to the perimeter of the rectangular table cloth.

Perimeter of a rectangle = 2(l + b) , Where l is length and b is breadth of the rectangle.

Here,

Length(l) = 5m.

Breadth(b) = 4m.

$\implies$ Perimeter of the rectangular table cloth  = 2(5 + 4)

$\implies$ Perimeter of the rectangular table cloth  = 2 × 9

$\implies$ Perimeter of the rectangular table cloth  = 18m.

∴ 18m of tape is needed to measure the table cloth.