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Numbers 105, 115, 125, ……985, 995 first number (a) = 105 The last number (8) = 995 All difference (d) =10 From the formula, nth term (Tn) = a + (n-1) d, 995=105+(n-1) 10 n = 90 Sum of n terms (Sn) =n/2 [2a+(n-1) d] 90/2[2 ×105+ (90-1)10] = 45 [210+890] = 45 × 1100 = 49500.
Calculate the perimeter of a rectangle, given that a circle with an area of 308 cm² has a radius that matches the diagonal of a square. The ratio betwe...
The volume and height of a cylinder are 7986 cm3 and 21 cm. Find the radius of the cylinder.
What is the difference between (in m2) the area of a circular field of radius 21 metres and area of a rectangular piece of land having its di...
The sum of the areas of two circles P and Q is 20020 cm2. If the product of the diameters of both circles P and Q is 12348 cm, then find out ...
A cylinder has a height of 14 cm and a radius of 7 cm. Find the total surface area.
If the edge of the cube is increased by 10%, then find the percentage increase in the volume of the cube.
A right circular cylinder having diameter 21 cm & height 38 cm is full of ice cream. The ice cream is to be filled in cones of height 12 cm and diameter...
If the volume of a cuboidal tank is 3240 m3 and the ratio of the length, width and height of tank is 6:5:4 respectively then find the height ...
Find the area of a rhombus (in cm2) whose side is 13 cm and the smaller diagonal is 11 cm?
In a zoo, 30% of the people are males. 50% of the remaining are females and the remaining 630 are children. Find the total number of people in a zoo.
