RRB NTPC · Question 38
An internet bill costs Rs. 6 for 2 minutes 30 seconds. What is the cost (in rupees) for 3 minutes 20 seconds? (Round up to one decimal)
Show answer & explanation
Answer: (A) 8
Explanation
2 min 30 s = 150 s costs Rs 6, so 3 min 20 s = 200 s costs 6 × 200/150 = Rs 8.