s = v * t
v = 10
t = 20
s = 10 * 20
s = 200
v = 62
t = 28 1
s = 62 * 28 62
s = 1736 * 28
496
124
1736
№6
t = s : v
s = 2448
v = 12
t = 2448 : 12
t = 204
s = 3672
v = 18
t = 3672 : 18
90-25=65(берез осталось посадить)