Three inlet pipes A, B, &C fill a tank in 12, 15, and 20 Hr. If All Pipes are open together then the tank will be filled in how many times?

Two inlet pipes A and B fill a tank in 20 and 30 Hr. Both Pipes are open together then the tank will be filled in how many times?

Two inlet pipes A and B can fill an empty cistern in 22 and 33 hours, respectively. They are switched on together but Pipe B had to be closed for 7 hours the cistern was full. How many hours in all did it take pipes to fill the cistern?

Ratio Of Area of Rectangle To Area Of Square Is 1:4, Ratio Of Perimeter Of Rectangle To Perimeter Of Square Is 1:2. If The Length Is 5 cm Then Find The Area Of Square

If 5x + 9y = 5 and 125x3 + 729y3 = 120, then the value of the product of x and y is?

A's income is Rs. 140 more than B's income and C's income is Rs. 80 more than D's. If the ratio of A's and C's income is 2 : 3 and the ratio of B's and D's income is 1: 2, then the incomes of A, B, C, and D are respectively.

A)     Rs. 60, Rs.120, Rs. 320 and Rs. 240

B)     Rs.300, Rs.160, Rs. 600 and Rs. 520

C)     Rs.400, Rs.260, Rs. 600 and Rs. 520

D)     Rs.320, Rs.180, Rs. 480 and Rs. 360

B+c take 50% more time then a+b+c to finish a work if all three work together then b gets 120? out of the total wagaes of 450? .in how many days will all 3 finish the work if a+b take 8/3 days more then a+b+c

A and B working together can complete a work in \D\ days . Working alone A takes (8+d) days and B takes (18+d) days to complete the same work. A works for 4 days , so the remaining work will be completed by B alone in how many days ??