the diameter of a circular-table is 80 cm, find the drcumference. Also, find the cost of covering the
boundary with a ribbon at the rate of Rs. 3 per em: Take n= 22/7thint: C= 214R]
Answers
Step-by-step explanation:
diameter=80 cm
radius=80/2=40 cm
circumference=2πr
=2*22/7*40
=1760/7=251.42 cm
cost of covering for 1 cm=RS.3
cost of covering 251.42 cm=3*251.42.=754.26rs.
GIVEN THAT
Diameter of the circular table = 80 cm
Cost of covering the boundary of the
circular table per metre = rs 3
TO FIND
Total cost of covering the boundary
of the circular table by the ribbon.
FORMULA USED
Circumference of circle = 2 × π × r
SOLUTION
Radius of the circular table = D / 2
➡️ 80
2
➡️ 40 cm
So, radius of the circular table is 40 cm
Circumference of the table = 2 × π × r
➡️ 2 × 22 × 40
7
➡️ 251.42 cm
So, circumference of table is 251.42 cm
NOW,
Total cost of covering the boundary =
➡️ rs ( 251.42 × 3)
➡️ rs 754.28
So, total cost of covering the boundary of the circular table by ribbon = rs 754.28