Class 7 (Perimeter)
Q1) Find the distance covered by Renu in taking 2 rounds of a rectangular park of length 65m and breath 40m .
Q2) Find the side of the regular pentagon whose perimeter is 120 cm.
Q3) The perimeter of a rectangular field is 236 m if it's length is 64 m .find it's breath.
Q4) If 336m of wire is required for fencing square Gardern. Find the side of the garder n.
Q5) Find the perimeter of a square whose side is 3x.
Q6) The length and breath of a rectangular field are 125m and 75m respectively. Find the cost of fencing it at the rated of RS 5 per metre.
Answers
Answer:
1. 2(l+b)
2(65+40)
2(105)
215cm
He takes 2 rounds= 2×215
=430cm
3. 236m = 2(l+b)
236 = 2(64+b)
.....
Answer:
Q1) distance= 420cm
Q2) side= 24cm
Q3) breadth = 54 cm
Q4) side= 84 cm
Q5) perimeter= 12x
Q6) Cost= ₹2000
Step-by-step explanation:
Q1) Perimeter of rectangle =2(l+b)
l=65cm
b=40cm
Distance covered by Renu =2 (Perimeter of the rectangle
= 2(2(l+b))
=2(2(65+40))
=2(2(105)
=2(210)
=420cm
Q2) Perimeter =120 cm
side of pentagon = perimeter/5
=120/5
=24cm
Q3) Perimeter= 236cm
length =64cm
breadth =b
Perimeter=2(l+b)
236=2(64+b)
236/2= 64+b
118=64+b
118-64=b
54=b
Q4) side=m=336/4
side= m=84 cm
Q5) side= 3x
Perimeter= 4(side)
=4*3x
=12x
Q6) length= 125m
breadth= 75m
Perimeter= 2(l+b)
= 2(125+75)
=2*200
=400m
Cost of fencing 1m= ₹5
Cost of fencing = 400*₹5= ₹ 2000