Question
What does the "Projection" operation in relational
algebra do?Solution
Selects certain columns from a relation
The wheel of a car made 300 rotations. How much distance did the car travel if the diameter of the wheel is 28 inches? (1 inch = 2.54cm)
- In a circular field, the area is six times its circumference in terms of numerical value. Calculate the diameter of the field.
In a circle, two chords AB & CD are produced at P which is outside the circle . If PA= 18 cm, AB= 12 cm , PC = 6 cm then find CD.
Determine the diameter of the incircle of a triangle whose area is 60 cm² and the semi-perimeter is 20 cm.
- The circumference of a circle is 176 cm while the length of the rectangle is 9 cm more than the radius of the circle. Find the perimeter of the rectangle i...
A sector of a circle has a central angle of 120° and a radius of 10 cm. Find the area of the sector.
A semicircle has a radius of 7 cm. What is the perimeter of the semicircle?
A circular racing track has been developed in a field. If the difference between the outer circumference and the inner circumference of the racing track...
In a circle AB is diameter & C is a point on circumference such that AC = 8 cm & BC = 15 cm then find the area of circle ?
- Find the area of a circle whose radius is (3/4)ᵗʰ of the side of a square whose area is 1,600 cm². (Use π = 3.14)
Relevant for Exams:
