Question

a rectangular sheet of cardboard 132 CM X 50 cm is rolled along its length and cylinder is formed find the radius of base of cylinder?​

Answer 1

Root over 42 is the answer that is also written as 6.480.....

132 = 22/7 x r x r

132 x 7/22 = r x r

r x r = 6 x 7

r x r = 42

   or

r = root of 42