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Total age of 14 girls = 42 x 14 = 588 years If the age of two more girl is added the average decreases by one and a half year, Total age of 16 girls = 40.5 x 16 = 648 Now, sum of the age of new girls = 648 - 588 = 60 years
The radius of a sphere is 75% of the radius of a cylinder, while the height of the cylinder is 25% greater than its radius. Determine the ratio of the v...
The length of a rectangle is 9 metres more than its width. If the perimeter of the rectangle is 50 metres then what is the area (in m2 ) of ...
In an exam of 100 marks, the average marks of a class of 38 students are 72. If the top 3 scorers of the class leave, the average score falls “dow...
Find the surface area of the smallest cube that can perfectly fit a sphere of volume 2304π cm3 inside it.
Area of a rhombus whose one of the diagonals (d1) is 28 cm, is 560 cm2. Each side of a square paper is 20 cm more than other diagonal (d2) of...
The perimeter of 4 squares is 20 cm, 36 cm, 40 cm and 48 cm respectively. What will be the area of the square having perimeter equal to sum of edges of ...
When the ratio of the length and breadth of the rectangle is given as 3:2. If the perimeter of the rectangle is equal to the perimeter of the square, wh...
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...
Find the area of the octagon whose side is 20 cm?
(175/3)% of the raindrops could have been collected, when 6 cm of rain has fallen on a part of land of area 2 km2, in a tank having a 200 m &...
