A mobile battery in 1 hour charges to 20 percent.How much time (in minute) will it require more to charge to 40 percent. Choose the correct choice from the following.
A) 120	B) 150	C) 175	D) 160	E) 130

Rationale: 1 hr = 20 percent . thus 15 min = 5 percent . now to charge 40 percent 120 min . answer : a
Answer: A