Question

A rectangular sheet of paper of dimension 44cm into 18cm is rolled along its length to form a cylindrical find the total surface area of the cylinder so formed​

Answer 1

Answer:

L= 44 and B=18

Rolled along its length so 2 pie r= 44

2*22/7*r=44 so r=7

now height of cylinder is 18 cm

TSA of cylinder is 2pie r (r+h)

2*22/7*7(7+18)= 44*25= Answer is 1100 cm^2

Step-by-step explanation:

Answer 2

Answer:

1. the rectangular paper sheet is equal to cylinder. So, circumference of the circle is equal to length.

2pie radius is equal to length. 2×22÷7×radius=44. radius=7

we know what is radius. So, total surface area of the cylinder =2pie×radius(h+r)

2×22÷7×7(18+7)

so, 7 to 7 cancel out. So

2×22×25=1100