Average 20 numbers is ‘x’. If the average of first 12 numbers is 62.5 while average of last 5 numbers is 74.8 and 13th, 14th and 15th numbers are (2x - 33), (4x + 54) and 178 respectively. Find the 14th number.
According to question, => 20x = 62.5 × 12 + 74.8 × 5 + 2x – 33 + 4x + 54 + 178 => 14x = 1323 => x = 94.5 Therefore, 14th number = 4 × 94.5 + 54 = 148.5
A tank 60m long, 45m broad and 18m deep is dug in a ground 2000 m long and 45m wide. By how much will the level of the field rise if earth dug out of t...
The area of a regular hexagon with side as 6 cm is
Length of a rectangle is equal to the side of a square. If area of the square and rectangle is 729 m2 and 297 m2, respectively the...
The length of the side of a cube is 7 cm. What is the total surface area of the cube?
Find the number of silver balls of diameter 2 cm each, that can be made from a sphere of diameter 32 cm?
A circle is inscribed in a square an equilateral triangle of side 6√2 cm is inscribed in that circle the length of the diagonal of the square is-
The lateral surface area of a cube is 144 cm . The length of a cuboid is 50% more than the side of the cube. The breadth of the cuboid is 5 cm less than...
Determine the base length of an isosceles triangle with an area of 288 cm² and an altitude measuring 36 cm.