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First term of AP = a = - 21 & last term = l = 40 Number of terms = n = 14 Sum of AP = n/2 (a + l) = 14/2 (- 21 + 40) => 19 x 7 = 133
The area of four walls of a room is 160 cm2. If the length and breadth of the room were equal and the height of the room is 5 cm, then what i...
Perimeter of a rectangle is 50% more than that of a square of side 30 cm. If the difference between the length and breadth of the rectangle is 7 cm, res...
There is a rectangular paper, whose length and breadth are in the ratio 7:8, respectively and it has a perimeter of 60 metres. If a triangular piece wit...
The radius of a circle is equal to the radius of base of a cone. If the diameter of the circle is 35 cm and the height of cone is 18 cm, then find the v...
A hemisphere has a total surface area of 604.8 cm². Calculate the volume of a sphere that has the same radius as the given hemisphere. (Take π = 3.15)...
A square is converted into a rectangle by increasing its length by 50 % and decreasing its width by 20%. Which of the following statements is true?
The cost of fencing a rectangular plot at the rate of Rs. 12/metre is Rs. 960. If the ratio of the length to breadth is 5:3, find the area of the rectan...
If the area of a rhombus is 14504 m² and the ratio of the diagonals is 37:49 then find the length of the shorter diagonal.
A bus covers some distance at a certain speed. If a person covers one-third of that distance in triple time, then the ratio of the speed of the person t...
How many bullets can be made out of a lead cylinder 32cm high and 12 cm radius, each bullet being 4 cm in diameter?
