2. Find the perimeter of the rectangle in each of the following:
(a) Length = 15 cm and breadth = 10 cm
(b) Length = 120 m and breadth = 100 m
(c) Length = 4 m
and breadth=320 cm
(d) Length = 250 cm and breadth = 2m
(e) Length = 2 m 40 cm and breadth = 200 cm
(1) Length = 50 dm and breadth = 200 cm
ong and 8 cm hroad Find its perimeter
Answers
Answer:
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Answer:
a) l=15cm and b=10cm
Perimeter = 2×(15+10)
= 2×(25)
= 50 cm
b) l=120m and b=100m
Perimeter = 2×(120+100)
= 2×(220)
= 440 m
c) l=4m and b=320cm
Since, we know that 1m= 100cm
Therefore, 4m=4×100
=400cm
So, l=400cm
Perimeter = 2×(400+320)
= 2×(720)
= 1440 cm
d) l=250cm and b=2m
Since, we know that 1m= 100cm
Therefore, 2m=2×100
=200cm
So, b=200cm
Perimeter = 2×(250+200)
= 2×(450)
= 900 cm
e) l=2m 40cm and b=200cm
Since, we know that 1m= 100cm
Therefore, 2m=2×100
=200cm
And, l=2m 40cm
=200cm + 40cm
=240cm
So, l=240cm
Perimeter = 2×(240+200)
= 2×(440)
= 880 cm
1) l=50dm , b=200cm and height=8cm
Since, we know that 1dm= 10cm
Therefore, 50dm=50×10
=500cm
So, l=500cm
Perimeter = 2×(500+200+8)
= 2×(708)
= 1416 cm
Step-by-step explanation:
1) Formula for the Perimeter of the rectangle is : 2×(l+b) or 2l+2b.
2) Make the units of both the length and breadth same,if they are not.
3) Apply the value of length and breadth in the formula and find out your required Perimeter.
Tip: Try to convert the largest unit into smallest unit,it makes the calculation very easy.