Question

A poster of size 12cm X 10cm as pasted on the sheet of a cardboard such that there is a margin of width 1.5cm along each side of the poster.find the total area of the margin and also find the cost of the cardboard used at the rate of rupees 2.50 per square meter.​

Answer 1

Answer:

Area of Margin = 75 cm²

0.04875 Rs

= 4.875 Paise

Step-by-step explanation:

Poster size = 12 & 10 cm

Poster Area = 12 * 10 = 120 cm²

Card board Length  = 12 + 1.5 + 1.5 = 15cm

Cardboard Width  = 10 + 1.5 + 1.5 = 13cm

Cardboard Area  = 15 * 13 = 195 cm²

Area of Margin = Cardboard Area - Poster Area

Area of Margin = 195 - 120 = 75 cm²

Card board used = 195 cm²

Card board used = 195/10000 m² ( 1 cm = 1/100 m  & 1 cm²=1/10000 m²)

Rate of cardboard = 2.5 Rs/m²

Cost of cardboard = (195/10000) * 2.5

= 0.04875 Rs

= 4.875 Paise

Answer 2

$\textbf{\huge{ANSWER:}}$

Size of the poster = 12 cm × 10 cm

Area of the poster = 120 $cm^{2}$

Dimensions of the cardboard = 12 + 1.5 + 1.5 ( cm ) = 15 cm

And the other dimensions of the cardboard = 10 + 1.5 + 1.5 ( cm ) = 13 cm

Size of the cardboard = 15 cm × 13 cm

Area of the cardboard = 195 $cm^{2}$

Area of the $\tt{margin}$ = 195 - 120 ( $cm^{2}$ )

Area of the margin =》 75 $cm^{2}$

Cost of the Cardboard = Rs. 2.5 per $m^{2}$

Area of the cardboard = 195 $cm^{2}$

In $m^{2}$, the value turns out to be = $\frac{195}{10000}$

The Cost of the area of the cardboard = $\frac{195}{10000}\times2.5$

The Cost turns out to be =》 $\tt{Rs\:0.04875}$