10 men can do a job A in 15 days and 15 men can do job B in 20 days.in how many days can 30 men do both the jobs?
Answers
Answered by
6
Job A = 10 men & 15 days
Job B = 15 men & 20 days
25 men done the job in 35 days
so 25 = 35
∴ 30 = 30/25 × 35
= 42 days
Answered by
1
30 men can do both the jobs in 15 days.
GIVEN
Days taken by 10 men to do job A = 15 days
Days taken by 15 men to do job B = 20 days
TO FIND
Days taken by 30 Men to do both jobs
SOLUTION
We can simply solve the above problem as follows;
Number of days taken by 10 men to do job A = 15 days
Days taken by 1 Man to do job A = 15 × 10 = 150 days
Similarly,
Number of days taken by 15 men to do job B = 20 days
Days taken by 1 man to do Job B = 20×15 = 300 days
Days taken by 1 man to do Job A + B = 300 + 150 = 450 days
Days taken by 30 men to do Job A + Job B = 450/30 = 15 days.
Hence, 30 men can do both the jobs in 15 days.
#Spj2
Similar questions