The lateral surface area of a cylinder is 1056 CM² and height is 10 cm find its radius 21/2cm
84/5cm
42/2cm
11.5

The answer is 16.8 ( corr. to 3 sig. fig ) so the closest answer should be 84/5cm

lateral surface area of cylinder = 2πrh

so , 2 × 22/7 × r × 10 = 1056

440r/ 7 = 1056

r =( 1056 × 7 )440 = 84/5 cm or 16.8 cm

b

step-by-step explanation:

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b