Advertisements
Advertisements
प्रश्न
How much distance, in metres, a wheel of 25 cm radius will cover if it rotates 350 times?
Advertisements
उत्तर
Given, radius of wheel (r) = 25 cm = `25/100`m = `1/4`m ...`[∵ 1 cm = 1/100m]`
∵ Distance travelled in one rotation = 2πr = `2 xx 22/7 xx 1/4 = 11/4`m
∴ Distance travelled in 350 rotation = `11/7 xx 350` = 550 m
Hence, the wheel covers 550 m distance.
APPEARS IN
संबंधित प्रश्न
Find the area of the following circle, given that diameter = 49 m.
Find the length of the diagonal of a square whose area is `128 cm^2` Also, find its perimeter.
A square water tank has its side equal to 40 m. There are four semi-circular grassy plots all round it. Find the cost of turfing the plot at Rs. 1.25 per square metre (Take π = 3.14).
Two circular pieces of equal radii and maximum area, touching each other are cut out from a rectangular card board of dimensions 14 cm × 7 cm. Find the area of the remaining card board. (Use π = 22/7).
In the given figure, the side of square is 28 cm and radius of each circle is half of the length of the side of the square where O and O' are centres of the circles. Find the area of shaded region.
Find the area of the shaded region in the given figure, if ABCD is a rectangle with sides 8 cm and 6 cm and O is the centre of the circle.
If three circles of radius a each, are drawn such that each touches the other two, prove that the area included between them is equal to `4/25"a"^2`.
The area of the sector of angle θ° of a circle with radius R is
A wire when bent in the form of an equilateral triangle encloses an area of `121sqrt(3)" cm"^2`. If the same wire is bent into the form of a circle, what will be the area of the circle?
In the following figure, a rectangle ABCD enclosed three circles. If BC = 14 cm, find the area of the shaded portion (Take π = 22/7)
