A Bath Tub Can Be Filled By A Cold Water Pipe In 20 Minutes And By A

1.	A Bath Tub Can Be Filled By A Cold Water Pipe In 20 Minutes And By A Hot Water Pipe In 30 Minutes. A Person Leaves The Bathroom After Turning On Both Pipes Simultaneously And Returns At The Moment When The Bath Tub Should Be Full. Finding However, That The Waste Pipe Has Been Open, He Now Closes It. In 3 Minutes More The Bath Tub Is Full. In What Time Would The Waste Pipe Empty It ?
Answer» TOTAL work = 1/20 + 1/30 (3+2)/60 = 5/60 = 1/12 For both of them needed = 12 min. But due to leakage it take = 15 min. So we can say for filling pipe it takes 3 minutes work for the waste pipe will be = 12 min. 3 min. of both filling pipe = 12 min. of waste pipe 12 min. of filling pipe will be = 48 min. of waste pipe i.e. Total work = 1/20 + 1/30 (3+2)/60 = 5/60 = 1/12 For both of them needed = 12 min. But due to leakage it take = 15 min. So we can say for filling pipe it takes 3 minutes work for the waste pipe will be = 12 min. 3 min. of both filling pipe = 12 min. of waste pipe 12 min. of filling pipe will be = 48 min. of waste pipe i.e.

A Bath Tub Can Be Filled By A Cold Water Pipe In 20 Minutes And By A Hot Water Pipe In 30 Minutes. A Person Leaves The Bathroom After Turning On Both Pipes Simultaneously And Returns At The Moment When The Bath Tub Should Be Full. Finding However, That The Waste Pipe Has Been Open, He Now Closes It. In 3 Minutes More The Bath Tub Is Full. In What Time Would The Waste Pipe Empty It ?

Answer»

TOTAL work = 1/20 + 1/30

(3+2)/60 = 5/60 = 1/12

For both of them needed = 12 min.

But due to leakage it take = 15 min.

So we can say for filling pipe it takes 3 minutes

work for the waste pipe will be = 12 min.

3 min. of both filling pipe = 12 min. of waste pipe

12 min. of filling pipe will be = 48 min. of waste pipe i.e.