Question

How much wood stick be required to frame 5 rectangular pictures of 20cm × 15cm?

Answer 1

find are of rectangle = l×b= 15×20=300cm²
wood required for 5 rectangle is 300×5=1500

Answer 2

Hey dear!!

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Dimensions of the photograph = 20 cm × 15 cm

Length of frame needed to frame the picture = perimeter of the picture 

= 2(l+b)

= 2(20 + 15)

= 2 × 35

= 70 cm

Therefore, length of frame needed to frame the picture is 70cm. 

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Hope helped!!