Question

4. X can do a piece of work in 25 days and Y can finish it in 20 days. They work together for 5 days and
then Y leaves. In how many days will X finish the remaining work?​

Answer 1

Answer:

Let the total work be 1

Then, According to question X takes 25 days to do 1 work.

Then work done by X in 1 day=

25

1

Also according to question Y takes 20 days to do 1 work.

Then work doe by Y in 1 day=

20

1

Then total work done by both of them in 1 day =

20

1

+

25

1

=

100

9

Then total work done by both of them 5 days=

100

45

Then total work left =1−

100

45

=

100

55

Now, As Y can do 1 work in 25 days therefore,

Y can do

100

55

work in

100

55

×25 days

=

4

55

days

Answer 2

Answer:

Natural Vegetation: Plants which grow on their own; without human intervention are called natural vegetation. Wildlife: Animals which live in their natural habitat; usually away from human habitations; are called wildlife.