Question

A picture measures 80cm×50cm. it has a frame of uniform width of 10cm all around and outside it what is the area of a frame​

Answer 1

3,700 cm²

Step-by-step explanation:

Difference of two rectangles, one being an external rectangle and the other an internal.

Area of external rectangle = length*breadth = 50 cm*80 cm = 4000 cm²

Area of internal rectangle:

length= 50cm - 2(10 cm) = 30 cm

breadth = 30 cm - 2(10 cm) = 10 cm

Area = length*breadth = 30 cm*10 cm = 300 cm²

Area of the border = Area of external rectangle - Area of internal rectangle

= 4000 cm² - 300 cm²

= 3,700 cm²

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Answer 2

Answer:

4100

Step-by-step explanation:

then as given the width of the frame is 10cm

so, we have to add 20 to the length and breath, the length and breath will become

Lenght = 80+20= 100

and breadth = 50+20=70

Then finally find the area

Lxb= 100x70 = 7000 sq cm