Question

Ram can plough a field in 12 days and Harish can do the same work in 16 days. How
much field will they plough together in
a. a day?
b. three days?
​

Answer 1

Answer:

three

Step-by-step explanation:

answer b is right 3

Answer 2

Given: Ram can plough a field in 12 days

           Harish can plough the field in 16 days

To find: How much field will they plough together in

            a) a day

            b) three days

Solution: Given that,

Ram can plough a field in 12 days

Work done by him in one day = $\frac{1}{12}$

Harish can plough the field in 16 days

Work done by Harish in one day = $\frac{1}{16}$

a) Work done by them together in one day = $(\frac{1}{12} + \frac{1}{16} )$

                                                                       = $\frac{4 \ + \ 3}{48} = \frac{7}{48}$

b) Work done by them together in 3 days = $3*\frac{7}{48} = \frac{7}{16}$ or $\frac{21}{48}$

Hence, they can together plough $\frac{7}{48}$ part of the field in one day and $\frac{21}{48}$ part in 3 days.