Digital Image- problems

PROBLEMS

41.- Think you want to print out a photograph with a size of DIN A4: 210 × 297 mm

maintaining a printing quality of 200 dpi. Which resolution would the image need? 

 DIN A4 Size:210 x 297=8.27x 11.69 inches

Quality of 200 dpi

Wide:

1654 px

Height:

2338 px

The image should have a resolution of 1654 × 2338 pixels to be printed at A4 size (210 × 297 mm) with a quality of 200 dpi.

42.- Which resolution would the same picture need to have a 300 dpi picture?

DIN A4 size: 210 × 297 mm = 8.27 × 11.69 inches.
Quality of 300 dpi:

Width  = 2481 pixels
Height  = 3507 pixels

Therefore, the image should have a resolution of 2481 × 3507 pixels (approximately 8.7 MP) to be printed in A4 size at 300 dpi quality.