On the wall of school's prayer hall, in a circle of $70 c m$ radius, a picture of nature is to be drawn, if the cost of drawing is $R s . 5$ per $100 s q c m$ , then find the total cost in rupees.

Open in App

Solution

Given: Radius of circular portion on the wall $(r) = 70 c m$
Cost of drawing $= R s . 5$ per $100 s q . c m$ .
Therefore, Total cost of drawing $= R s . \frac{5}{100} \times π r^{2}$
$= R s . [\frac{5}{100} \times \frac{22}{7} \times (70)^{2}]$
$= R s . 770$

Suggest Corrections

Similar questions

Q. In a school, exactly at the middle of the stage of the assembly hall, after drawing a circle of

2.8 m

radius, a beautiful picture is to draw in it. Cost for drawing is

R s . 300

per

1 s q m

. What is the total cost(in Rs) of drawing a picture in this circle?

Q. To fence a circular garden, the total cost is

R s . 26, 400

at the cost of

R s . 50

per metre. Find the radius of the circle.

A hall is in the shape of a parallelogram. One of the parallel walls measures 8 m. The perpendicular distance corresponding to that wall is 1.75 times the length of this wall. If the cost of carpeting the hall is Rs.2 per $m^{2}$ . Find the total cost of carpeting the hall.

Q. A hall is in the shape of a parallelogram. One of the parallel walls measures 8 m. The perpendicular distance corresponding to that wall is 1.75 times the length of this wall. If the cost of carpeting the hall is Rs.2 per

m^{2}

, find the total cost of carpeting the hall.

Q. To fence a circular garden, the total cost is Rs.26400 at the cost of Rs.50 per meter. Find the radius of the circle.

Join BYJU'S Learning Program

On the wall of school's prayer hall, in a circle of 70 cm radius, a picture of nature is to be drawn, if the cost of drawing is Rs.5 per 100 sq cm, then find the total cost in rupees.

Given: Radius of circular portion on the wall (r)=70 cmCost of drawing =Rs. 5 per 100 sq.cm.Therefore, Total cost of drawing =Rs. 5100×πr2=Rs. [5100×227×(70)2]=Rs. 770

On the wall of school's prayer hall, in a circle of $70 c m$ radius, a picture of nature is to be drawn, if the cost of drawing is $R s . 5$ per $100 s q c m$ , then find the total cost in rupees.

Given: Radius of circular portion on the wall $(r) = 70 c m$
Cost of drawing $= R s . 5$ per $100 s q . c m$ .
Therefore, Total cost of drawing $= R s . \frac{5}{100} \times π r^{2}$
$= R s . [\frac{5}{100} \times \frac{22}{7} \times (70)^{2}]$
$= R s . 770$