A mobile battery in 1 hour charges to 20 percent.How much time (in minute) will it require more to charge to 55 percent.
Options
A) 145 B) 150 C) 175 D) 165 E) 130

Rationale: 1 hr = 20 percent . thus 15 min = 5 percent . now to charge 55 percent 165 min . answer : d
Answer: D