Question

Class 9 Surfac...
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4 Chewider CSKA
CBSE Test Paper 01
CH-13 Surface Areas and Volumes
1. If a square paper of side 25 cm is rolled to form a cylinder, then its curved surface
area is
a 250 cm?
b. 500 cm?
c 1000 cm?
d. 625 cm?
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Answer 1

Answer:= 625 cm^2

Step-by-step explanation: h= side of square = 25 cm

                                     

     circumference of square=side of square= 25 cm

we can alo write is as = 2 x 22/7 x r = 25 cm

CSA= 2 x 22/7 x r x h

25 x 25 = 625 cm ^2

Step-by-step explanation:

Answer 2

op-D

625cm

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