[ناني فيزياء]

السلام عليكم هذه تجربة للحل وانشاء الله مضبوط

1mile = 5280 ft
20mile = x ft
x ft = 20 * 5280 = 105600 ft

change from ft to in
1ft = 12 in
105600ft = x in
x in = 12 *105600
x in = 1267200 in

change from in to cm
1in= 2.54 cm
1267200in = x cm
x cm = 3218688 cm

finally we will change from cm to km
1km = 100000cm
x km = 3218688 cm
x km = 32.18688