Laxmi and Prasanna set on a journey. Laxmi moves northwards at a speed of 15 kmph and Prasanna moves southward at a speed of 45 kmph. How far will be Prasanna from Laxmi after 60 minutes ? Choose the correct choice from the following answers
A) 11	B) 50	C) 28	D) 27	E) 60

Rationale: "explanation : we know 60 min = 1 hr total northward laxmi ' s distance = 15 kmph x 1 hr = 15 km total southward prasanna ' s distance = 45 kmph x 1 hr = 45 km total distance between prasanna and laxmi is = 15 + 45 = 60 km . answer : e"
Answer: E