Question

plse solve this

Answer 1

???

Answer 2

Ashish works in 20 minutes to finish the work, so , in 1 minutes, he finishes 1/20 work. got this part?

Answer 3

yup

Answer 4

his sister finishes that work in 25 minutes, that means in 1 minute, she finishes 1/25 work, got this part?

Answer 5

yes

Answer 6

ok, so, in 1 minute they work together, the finished work is 1/20 +1/25, right?

Answer 7

okay

Answer 8

\[\frac{1}{20}+\frac{1}{25}=\frac{45}{500}=\frac{9}{100}\]
that means in 1 minute, they finish 9/100 work, so, in 5 minutes they work together, how many work they can finish?

Answer 9

so i have multiply 9/100 by 5

Answer 10

=?

Answer 11

9/20mins

Answer 12

9/20, right?

Answer 13

not minutes, 9/20 work

Answer 14

k

Answer 15

so, in 5 minutes they work together, they finish 9/20 work, then his sister left, so the leftover is 11/20 work, right?

Answer 16

20/20-9/20=11/20

Answer 17

11/20------------?

Answer 18

work

Answer 19

got it? not finish yet