সব প্রশ্নে ফিরে যান
Math
A and B can do a work in 12days,B and C in 15days,C and A in 20days.If A,B and C work together ,They will complete the work in:
A) 5days
B) 7days
C) 10Days
সঠিক উত্তর
D) 15Days