When the speed is increased by 4 miles per hour, it takes for our less to cover a distance of 32 km. Find the previous speed.
The radius of a circle is increased so that and circumference by 5%. The area of the circle will be increased by.
A wire can be bent in the form of a circle of radius 56 cm. It is a bent in the form of a square, then what will be its area?
In a railway compartment, 6 seats are vacant on a bench. In how many ways can 3 passengers sit on them?
The distance from the point P to two vertices A and B of an equilateral triangle are |PA| = 2 and | PB | = 3. What is the greatest possible value of | PC].
The average of 10 integers is 16. If the sum of 6 of them is 100. What is the average of other 4?
If p and n are integers such that p> n> and p2- n2 = 12, which of the following value of p n?
Income tax is raised from tk. 4 to tk. 5 but the revenue is increased by 10% only. Find the decreased percentage in the amount taxed.
Find the area of rhombus one side of which measure 20 cm and one diagonal 24 cm.
The present worth of Tk. 169 due in 2 years at 4% per annum compound interest is-
Which chemical is required for removing, MgSO4 from the raw-water?