Question

A picture is painted on a cardboard 8 cm and long 5cm such that there is a margin of 1.5cm along each of it's sides. find the total area of the margin​

Answer 1

Answer:

17.25 sq cm

Step-by-step explanation:

l=8cm

b=5cm

margin=1.5cm

FIRST find the area of cardboard

area of cardboard = lb

                               =5X8`=40 sq cm

SECOND find the area of painting

l=8-1.5=6.5cm

b=5-1.5=3.5cm

area of painting = lb

                            = 6.5X3.5

                            =22.75 sq cm

NOW to find out the area covered by margins

area  of cardboard - area of painting=40 - 22.75

                                                               = 17.25 sq cm