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Let the radius of the sphere = 100 Area of sphere = 4π ×10000 When the radius decreased by 55% So, radius =45 Then area = 4π×45×45= 4π×2025 Decreased surface area = 10000-2025=7975 Percent of decrease = (7975/10000) ×100 =79.75%
The perimeter of semicircle is 36 cm and the radius of the semicircle is equal to the height of a Cylinder whose volume is 198 cm 3 . then fi...
A rectangular sheet measuring 44 cm by 38 cm has a square with a side length of 3 cm removed from each of its corners. The altered sheet is then folded ...
The surface area of the two spheres are in the ratio9:16. Their volumes will be in the ratio
The area of four walls of a room is 168 cm2. If the length and breadth of the room were equal and the height of the room is 7 cm, then what i...
If the area of a square field is 625 m2, then find the diagonal of the square field.
The circumference of a circle is 44 cm and the length of the rectangle is 4 times the radius of the circle. Find the area (in cm2) of the rec...
A race track is in the shape of a rectangle with length of 75 metres and area of 3000 m2. A car takes 20 seconds to make one lap around the p...
If the area of a square field is 484 m2, then find the diagonal of the square field.
A giant circular wheel has a diameter of 14 metres. In how many revolutions will the wheel cover a total of 4.4 km?
A racetrack is in the shape of a rectangle with length of 48 meters and area of 6000 m 2. A car takes 10 seconds to make one lap around the ...
