If niti drives her car at 5okm/hr from her home,she reaches the office late by 10min. However if she drives at 60km/hr,she reaches the office 5min early.find the distance of the office from her home.

Answer 1

5 + 10 = 15 min = 0.25 hours.

d1 = d2.
50t = 60(t-.25)
50t = 60t - 15
50t - 60t = -15
-10t = -15
t = 1.5 h.

D = r*t = 50 * 1.5 = 75 Miles.