Question

A can do a piece of work in 20 days and B can do the same piece of work in 30 days. Find that in how many days both can do the work?
A. 10 days
B. 12 days
C. 14 days
D. 16 days

Answer 1

Given :-

• A can do a Piece of work in = 20 days.
• B can do same work in = 30 days.

Solution :-

→ Per day work of A = (1/20)

→ Per day work of B = (1/30)

Both 1 day work :-

→ (1/20) + (1/30)

→ (3+2)/60

→ (5/60)

→ (1/12)

Hence, Both Complete whole work in 12 days. (B).

Answer 2

Answer:12

Step-by-step explanation:

A=1/20;B=1/30.

Lcm=60

1/20+1/30.

3+2/60

=5/60

The inverse of 5/60 is 60/5.

Answer:12 days