Question

Distance between suresh's office and home is 84 km. If he drives at 70 kmph he reaches 15 minutes later than the usual time. Find his speed on the next day if he reaches 15 minutes earlier than the usual time. (in kmph)

Answer 1

Step-by-step explanation:

Velocity = Distance/ Time

Distance= 84km

Velocity= 70kmph

Time without delay or increase

=distance/velocity

=84/70

=1.2 hr

=72 min

Time after 15 min delay

=72+15=87 min

=1.45 hrs

Time 15 mins earlier than exact time

=72-15=57 min

= 0.95 hr

Hence,

Velocity = 84/0.95

= 88.42 kmph