Question

At noon, rahul is 4 kilometer due south of the post office and travelling toward it at 10 kilometers per hour. Also at noon,kumi is 2 kilometers due east of the post office and jogging easy away from it at 5 kilometers per hour. After how many hours wil they be closest to each other?

Answer 1

For rahul

S=d/t

T=4/10=0.4hrs

For kumi

S=d/t

T=2/5=0.4hrs

So they will meet at the end of 0.4hrs