According to Question :
We have area of Rectangle =length x breadth
=b x a
Given breadth is decreased by 20% so we have new breadth =4a/5
And length is increased by 10% so new length of rectangle = 11b/10
Area of Rectangle = 4a/5 x11b/10
=44ab/50
So Area new =22ab/25
Which is less than previous one by 3/25 or 12% and it is 88% percent of previous one.
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishNine identical cubes, each with edge 3 cm, are joined in a straight line to form a cuboid. What is the total surface area (in cm²) of the resulting cuboid?
The curved surface area of a cylinder having radius 5 cm and height 23 cm is:
The surface area of a cube is 480 Find its volume.
The cost of polishing the total surface area of a solid cone at ₹ 0.50 per cm² is ₹ 5632, and the circumference of its base is 176 cm. What is the height of the cone? (Use π = 22/7)
A circle is inscribed in a triangle with sides 28 cm, 45 cm and 53 cm. What is the area of the triangle excluding the area of the circle? (Use π = 3.14)
The parallel sides of a trapezium are 48 cm and 20 cm. Its non-parallel sides are 26 cm and 30 cm. What is the area (in cm²) of the trapezium?
The curved surface area of a solid metallic right circular cylinder is 1792π cm² and its base radius is 32 cm. It is melted and recast into 42 solid spherical balls of equal radius. What is the surface area (in cm²) of a ball ?
A cubical tank with side 50 cm is full of water. If 61 litres of water is taken out of it, the level of water in the tank will drop by:
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