Answer
3 minutes, 45 seconds (or 3.75 minutes)
Work Step by Step
distance = rate * time
hyena: $d+.5 = 40*t$
giraffe: $d = 32*t$
$d = 32*t$
$d/32 = 32*t/32$
$d/32 = t$
$d+.5 = 40*t$
$(d+.5)/40 = 40*t/40$
$(d+.5)/40 = t$
$(d+.5)/40 = d/32$
$40d = 32*(d+.5)$
$40d = 32d +16$
$8d = 16$
$8d/8 = 16/8$
$d=2$
$d = 32*t$
$2 = 32*t$
$2/32 =32*t/32$
$1/16 =t$
$d = 32*t$
$d = 32*1/16$
$d=32/16$
$d=2$
$1/16 = x/60$
$16x=60$
$16x/16 = 60/16$
$x = 3.75$ minutes
$d=32/60*3.75$
$d=120/60$
$d=2$
$d+.5=40/60*t$
$d+.5=2/3*3.75$
$d+.5=2.5$
$d=2$
