In covering a distance of 30 km, Sachin takes 2 hours more than Rohit. If Sachin doubles his speed, then he would take 1 hour less than Rohit. Sachin speed is:
A. 5 kmph
B. 16 kmph
C. 21 kmph
D. None of these
Answer: A.
Explanation:
Let Sachin’s speed be X km/hr.
Then, 30/x - 30/2x = 3 6x = 30 x = 5 km/hr.