Walking at 6/7th of his usual speed, a man is 25 mins too late. His usual time is  Choose the correct answer
A) 7.5 hrs  B) 1.5 hrs  C) 2.5 hrs  D) 1.67 hrs  E) 2.67 hrs
As the distance is same s*t=6/7s*(t+25)   solving this we get t=150 sec    150/60= 
<gadget id="calculator"> 150/60</gadget>
<output>5/2 = around 2.5</output>
2.5 hrs   ANSWER:2.5 hrs
<result>C</result>
Walking at 6/7th of his usual speed, a man is 25 mins too late. His usual time is