If a jogger jogs 16 km/hr instead of 12 km/hr, he would have jogged 10 km more. The actual distance he jogged is
Choose the correct choice
A) 50 km B) 40 km C) 30 km D) 20 km E) none of these

Rationale: explanation : the actual distance jogged be d . = > d / 12 = ( d + 10 ) / 16 = > 16 d = 12 d + 120 = > 4 d = 120 = > d = 30 answer : c
Answer: C