Savitri had to make a model of a cylindrical kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the kaleidoscope. What would be the area of chart paper required by her, if she wanted to make a kaleidoscope of length 25cm with a 3.5cm radius? You may take (π=227)
540cm2
520cm2
550cm2
560cm2
A
540cm2
B
560cm2
C
550cm2
D
520cm2
Open in App
Solution
Verified by Toppr
Kaleidoscope is of cylindrical shape.
∴ Area of chart paper required = CSA of cylinder
=2πrh
=2×227×3.5×25
=550cm2
Was this answer helpful?
92
Similar Questions
Q1
Savitri had to make a model of a cylindrical kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the kaleidoscope. What would be the area of chart paper required by her, if she wanted to make a kaleidoscope of length 25cm with a 3.5cm radius? You may take (π=227)
View Solution
Q2
Savitri had to make a model of a cylindrical Kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the Kaleidoscope. What should be the area of chart paper required by her, if she wanted to make a Kaleidoscope of length 25 cm with a 3.5 cm radius ?
View Solution
Q3
Amita wants to make rectangular cards measuring 8cm×5cm. She has a square chart paper of side 60cm. How many complete cards can she make from this chart? What area of the chart paper will be left?
View Solution
Q4
Question 50
Amita wants to make rectangular cards measuring 8 cm×5 cm. She has a square chart paper of side 60 cm. How many complete cards can she make from this chart? What area of the chart paper will be left ?