For the following questions answer them individually
Three pipes A, B and C fill a tank in 30 minutes, 20 minutes and 10 minutes respectively. When the tank is empty, all the three pipes are opened. If A, B and C discharge chemical solutions P, Q and R respectively, the part of solution R in the liquid in the tank after 3 minutes is
A, B and C can do a piece of work in 20,24 and 30 days respectively. They undertook to do the piece of work for 5,400. They begin the work together, but B left 2 days before the completion of work and C left 5 days before the completion of work. The share of A from the assured money is
The simplified value of
$$\frac{112}{\sqrt{196}}\times\frac{\sqrt{576}}{12}\times\frac{\sqrt{256}}{8}\ is$$
The cost price of a book is 300. The shopkeeper wants to gain 20% after allowing a discount of 10% on the marked price. Then the marked price of the book must be
The printed price of a book is 60. But the seller allows successive discounts of 20% and 30%. The net sale price is subject to a sales tax of 5%, the net sale price is
Weight of a solid metal sphere of radius 4 cm is 4 kg the weight of a hollow sphere made with same metal whose outer diameter is 16 cm and inner diameter is 12 cm is
The radii of a sphere and a right circular cylinder are equal and their curved surface areas are also equal. The ratio of their volumes is
A man covers a certain distance on scooter had he moved 3 km/hr faster he would have taken 40 minutes less. If had moved 2 km/hr slower, he would have taken 40 minutes more. The distance in km is
A sum of money amounts to 2,240 at 4% per annum simple interest in 3 years the interest on the same sum for 6 months at 3$$\frac{1}{2}$$% per annum
