Question

A picture is painted on a cardboard 50 cm long and 30 cm wide such that there is a margin of 2.5cm along each of it's sides.find the total area of the margin.

Any one please answer.answer is 375cm .the problem is how it comes.

Answer 1

Area of the Cardboard:
length × breadth
= 50 × 30
= 1500 cm²

Area of the picture:
= (50-2.5) × (30-2.5)
= 47.5 × 27.5
= 1306.25cm²

Area of the margin:
=Area of the Cardboard - Area of the Picture
=1500-1306.25

= 193.75 cm²

Answer 2

: Ek cardboard hai 50x30 dimension ka
.. Uski area ho gyi 1500
.. Aur jitne area me picture draw ki h uski dimensions ho gayi 45x25
..Too drawn picture ki area 1125
..Area of margin =1500-1125=375