Advertisements
Advertisements
Question
Length of a rectangular field is 250 m and width is 150 m. Anuradha runs around this field 3 times. How far did she run? How many times she should run around the field to cover a distance of 4 km?
Advertisements
Solution
Given, length of rectangular field `(l)` = 250 m
And width of rectangular field `(b)` = 150 m
Perimeter of the field = 2(l + b)
= 2(250 + 150) m
= 2 × 400 m
= 800 m
∵ Distance covered in one round = Perimeter = 800 m
∴ Distance covered in three rounds = 3 × 800 = 2400 m
Now, number of rounds to cover 4 km,
i.e. 4000 m ...[∵ 1 km = 1000 m]
= `4000/800`
= 5
Hence, she should run 5 times around the field around the field to cover the distance of 4 km.
APPEARS IN
RELATED QUESTIONS
Find the length and perimeter of a rectangle, whose area = 120 cm2 and breadth = 8 cm
A rectangular field has length = 160m and breadth = 120 m. Find:
(i) the perimeter of the field.
(ii) the length of fence required to enclose the field.
(iii) the cost of fencing the field at the rate of? 80 per meter.
Find the perimeter of an isosceles triangle with each equal side = 13 cm and the third side = 10 cm.
Each rectangular tile is 40 cm long and 30 cm wide. How many tiles will be required to cover the floor of a room with length = 4.8 m and breadth = 2.4 m.
The perimeter of a rectangular field is 500 m and its length = 150 m. Find:
(i) its breadth,
(ii) its area.
(iii) cost of ploughing the field at the rate of ₹1.20 per square meter.
The cost of flooring a hall of ₹64 per square meter is ₹2,048. If the breadth of the hall is 5m, find:
(i) its length.
(ii) its perimeter.
(iii) cost of fixing a border of very small width along its boundary at the rate of ₹60 per square meter.
A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to be fenced with 4 rows of wires. What is the length of the wire needed?
What is the perimeter of the following figures? What do you infer from the answers?
 (a) |
 (c) |
 (b) |
 (d) |
36 unit squares are joined to form a rectangle with the least perimeter. Perimeter of the rectangle is ______.
An increase in perimeter of a figure always increases the area of the figure.
