A Woman travelling at 130% of her usual speed reaches her office 12 minutes early. Her usual time to cover the journey is:

0.87 hr

Let initial speed = 100x

New speed = 130% of 100x = 130x

Ratio of ,            Usual           New

Speed                   10       :      13

Time                     13       :      10

According to question ,

13R - 10R = 3R

3R = 12 minutes

1R = 4 minutes

Usual Time = 13R = 13 × 4 = 52 minutes

= \(\frac{52}{60}\) =  0.87 hours