Question

A alone can finish the work in 10 hours, B alone can finish the work in 12 hours and C alone can finish the work in 15 hours. A, B and C together started working at 11’o clock. After 2 hours A leaves. When will B & C will together will finish the work?

Answer 1

9'o clock is B
and 11’o clock is C
I hope this my correct answer
pleas mark the brainlist

Answer 2

4:20 is the correct answer