Question

Rajesh can build a wall alone in 20 days and Suresh alone can build it in 15 days. If Rajesh and Suresh works together, in how many days they can finish the wall ? ​

Answer 1

Answer:

20 days

Step-by-step explanation:

Answer 2

Answer:

Rajesh can build the wall in 20 days

1 day = 1/20 of the wall

Suresh can build the wall in 15 days

1 day = 1/15 of the wall

together they can build the wall in

1/20+1/15 days

= 7/60

Hence they together can complete the wall in 60/7=8.5 or 9 days

Step-by-step explanation:

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