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Price of 50 chairs = 50 × 200 = 10000 Price of 60 chairs (without discount) = 60 × 200 = 12000 Price of 60 chairs with discount = 50 × 200 + 10 × 80 = 10000 + 800 = 10800 ∴ Discount = 12000 – 10800 = 1200 Discount % = 1200/12000 ×100 = 10%
B invests 30% of his monthly salary on Travelling and 20% of remaining on Food. Again, he invested 25% of the remaining (after travelling and food expen...
A hollow cylinder has an internal radius of 7 cm and an external radius of 10 cm. If its height is 20 cm, find the total surface area of the cylinder.
The length of a rectangle is twice its breadth. If its length is decreased by 6 cm and breadth is increased by 6 cm, the area of the rectangle is increa...
The sum of the perimeters of a square and a rectangle is 120 metres. If the sum of the length and breadth of the rectangle is 30 m, then find the area o...
There is a rectangular paper, whose length and breadth are in the ratio 7:8, respectively and it has a perimeter of 60 metres. If a triangular piece wit...
If two complementary angles are in the ratio of 3:2, find the greater angle.
If the volume of a cuboidal tank is 2430 m3 and the ratio of the length, width and height of tank is 6:5:3 respectively then find the height ...
The areas of three adjacent faces of a cuboidal tank are 3 m², 12 m² and 16 m². The capacity of the tank. in litres, is:
If sec 2θ = cosec (θ – 36°), where 2θ is an acute angle, find the value of θ.
A circular clock has the hour hand of length 6 inch. Find the length of the distance it covers by it's tip from 9 p.m. to 3 a.m.