Question

ali on a motorcycle with a speed of 40 km / hour.after 30 minutes followed by budi with a speed of 50 km / hour.how minutes time is needed by the budi to follow ali?

Answer 1

2 hrs

Answer 2

how to get it?

Answer 3

take the relative velocity between two its 10km/hr since aliis followed by budi .5hours later thus by then ali must have traversed .5*40=20km.now with a relative speed of 10kmhr budi need 20hrs to catch up thank u..

Answer 4

i dont understand

Answer 5

still whats that u dont understand

Answer 6

from what 10 ho km/hour and 5 hour then 20 hour

Answer 7

do u understand relative velocity

Answer 8

no, sorry

Answer 9

ali on a motorcycle with a speed of 40 km / hour.after 30 minutes followed by budi with a speed of 50 km / hour.how minutes time is needed by the budi to follow ali?

Budi:
tB = (t-0.5) hour
tA = t

So using SA = SB;

SA = SB
vA x tA = vB x tB
vA x t = vB x (t - 0.5)
40t = 50(t -0.5)
40t = 50t -25
50t -40t = 25
10t = 25
t = 2.5 hour

or t = 2.5 x 60 minutes = 150 min

do you understand @mr.tobby ???