Question

2. A rectangle of length 14 cm and breadth 7 cm
is folded into a right circular cylinder. How
many revolutions does the cylinder need to
make to cover an area of 784 cm .sq??​

Answer 1

Answer:

8 revolutions

Step-by-step explanation:

From what I see here, the rectangle is curled into the shape of a cylinder. That means, for each revolution of the cylinder, the cylinder covers as much ground as the surface area of the rectangle. First, find the area of the rectangle:

    14 x 7 = 98

This means one revolution of the cylinder covers 98 cm^2. The last step is to divide the total area you must cover by the amount of area covered by one revolution, like so:

    784/98 = 8

That means 8 revolutions are needed to cover 784 cm^2.