pyq/2017/csat/33

A clock strikes once at 1 o’clock, twice at 2 o’clock, and thrice at 3 o’clock, and so on. If it takes 12 seconds to strike at 5 o’clock, what is the time taken by it to strike at 10 o’clock?

(A) 20 seconds

(B) 24 seconds

(C) 28 seconds

(D) 30 seconds