Perimeter Made Simple: With Tables For Class 4th & 5th [ 5]

SESSION – 4 (2ND PART)
TABULAR FORM QUESTIONS
FOR CLASS 4TH AND 5TH

Q 1]. Find the missing :

LENGTH 14m ?20mm?
BREADTH ? 8cm?12cm
PERIMETER 58m 34cm50mm40cm
[a] [b] [c][d]

SOLUTION :

[a] Given that :
L = 14 m
B = ?
Perimeter of rectangle = 58m = P

P = 2 * ( L + B )
58 = 2 * ( 14 + B )
58 /2 = 14 + B
29 -14 = B
15m = B

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[b] Given that :
L = ?
B = 8cm
Perimeter of rectangle = 34cm =P

P = 2 * ( L + B )
34 = 2 * ( L + 8 )
34/ 2 = L+8
17 – 8 = L
9 cm = L

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[c] Given that :
L = 20mm
B = ?
Perimeter of rectangle = 50mm = P

P = 2 * ( L + B )
50 = 2 * ( 20 + B )
50/2 = 20 + B
25 – 20 = B
5mm = B

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[d] Given that :
L = ?
B = 12cm
Perimeter of rectangle = 40 cm = P

P = 2 * ( L + B )
40 = 2 * ( L + 12 )
40/ 2 = L + 12
20 – 12 = L
8 cm = L

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