Question

Bunty and Babli together can paint a wall in 15 minutes while Bunty long can be paint the same wall in 40 minutes. They work together for 10 minutes, then bunty goes away. In how many minutes will bubbly paint the remaining part of the wall?​

Answer 1

Answer:

8 minutes

Step-by-step explanation:

1/40 + 1/B = 1/15

B+40/40B = 1/15

3B + 120 = 8B

5B = 120

B = 24

10(1/40 + 1/B) + x(1/B) = 1

10(1/40 + 1/24) + x(1/24) = 1

(3+5)/12 + x/24 = 1

(16+x) /24 = 1

16+x= 24

x = 8

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