Question

Pls fast the answer

Answer 1

Answer:18

Step-by-step explanation: Let the total work done be 120 which is the LCM of 30, 24 and 20

A+B 1 day work=4

B+C 1 day work=5

C+A 1 day work=6

Add all 3 equations and divide by 2

A+B+C 1 day work=7.5

A's 1 day work= 7.5-5=2.5

In 10 days all 3 complete 75 pieces of work. The rest 45 is completed in 18 days at the rate of 2.5 units per day by A.

Thank you