If a photocopier makes 2 copied in 1/3 second, at the same rate, how many copies does it make in 4 minutes ?

A 1200

B 24

C 144

D 1440

Correct Answer: Option D

Solution: In 1/3 second = 2 copies

so, in 1 second = 2 \( \times \) 3 = 6 copies

so, in 4 min or 240 sec = 6 \( \times \) 240 = 1440 copies.