The speed of a boat in still water in 42 km/hr and the rate of current is 8 km/hr. The distance travelled downstream in 44 minutes is:
Choose the correct choice from the following choices
A) 86.6 km  B) 46.6 km  C) 36.6 km  D) 35.6 km  E) 26.6 km

Rationale: "speed downstream = ( 42 + 8 ) = 50 kmph time = 44 minutes = 44 / 60 hour = 11 / 15 hour distance travelled = time × speed = 11 / 15 × 50 = 36.6 km answer : c"
Answer: C