Advertisements
Advertisements
Question
The floor of the circular swimming pool whose radius is 7 m has to be cemented at the rate of ₹ 18 per m2. Find the total cost of cementing the floor
Advertisements
Solution
Radius of the circular swimming pool r = 7 m
Area of the circular swimming pool A = πr2 sq.units
= `22/7 xx 7 xx 7 "m"^2`
= 154 m2
Cost of cementing a m2 floor = ₹ 18
Cost of cementing 154 m2 floor = ₹ 18 × 154
= ₹ 2,772
APPEARS IN
RELATED QUESTIONS
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the area of the sector formed by the arc. (Use π = `22/7`)
In the given figure, ABCD is a trapezium with AB || DC, AB = 18 cm DC = 32 cm and the distance between AB and DC is 14 cm. Circles of equal radii 7 cm with centres A, B, C and D have been drawn. Then find the area of the shaded region.
(Use \[\pi = \frac{22}{7}\]
Write the formula for the area of a sector of angle \[\theta\] (in degrees) of a circle of radius r.
If the difference between the circumference and radius of a circle is 37 cm, then using π = \[\frac{22}{7}\] the circumference (in cm) of the circle is
A wire can be bent in the form of a circle of radius 56 cm. If it is bent in the form fo a square, then its area will be
What is the diameter of a circle whose area is equal to the sum of the areas of two circles of diameters 10 cm and 24 cm?
The diameters of three circles are in the ratio 3: 5: 6. If the sum of the circumferences of these circles is 308 cm; find the difference between the areas of the largest and the smallest of these circles.
Find the radius and circumference of a circle, whose area is :
(i) 154 cm2
(ii) 6.16 m2
The sum of diameters of two circles is 112cm and the sum of their areas is 5236cm2. Find the radii of the two circles.
Area of circle of radius ‘n’ units is
