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Let, the radius, height and slant height of the cone be 'r' cm, 'h' cm, and 'l' cm. r = (42/2) = 21 cm h = 21 - 1 = 20 cm So, l2 = 212 + 202 = 441 + 400 Or, l2 = 841 Since, the slant height cannot be negative. So, l = 29 So, the curved surface area of the cone = π X r X l = (22/7) X 21 X 29 = 1,914 cm2
In a mixture of milk & water, 80 litres water is mixed due to which ratio changes from 3 : 4 to 1 : 3. Find initial quantity of mixture. (in litres)
130 litres of a mixture contains 35% milk and rest water. If ‘x’ litres of milk is added into the mixture then quantity of water in the final mixtur...
Mixture ‘A’ contains 80% acetone and rest 30 litres water. Mixture ‘B’ contains 72 litres acetone and rest 50% water. When two m...
Bowl 'P' initially holds 'a' liters of pure petrol. First, 25% of the petrol is removed and replaced with an equal amount of diesel. Subsequently, 40 li...
Two alloys are combined to create a new alloy. The first alloy contains 20% copper, and the second alloy contains 40% copper. If the resulting alloy has...
The mixture of petrol and Kerosene in two vessels are in the ratio 2:5 and 3: 7 respectively. In what ratio will liquids in both the vessels be mixed to...
A 360-liter mixture consists of milk and water in a 5:4 ratio. If 7.5% of the mixture is removed and replaced with the same amount of water, what is the...
The ratio of quantity of milk and water in a 300 litres mixture is 6:4, respectively. On removing 'M' litres of mixture the difference between the quant...
A 164-liter mixture consists of milk and water in a ratio of 17:24. The milkman sells 82 liters of this mixture and then adds 123 liters of water to the...
An 84-litre mixture contains 75% milk. If 'x' litres of water are added to this mixture, the quantity of milk in the resulting mixture becomes 27 litres...
