A metallic sphere of diameter 40 cm is melted into smaller spheres of radius 0.5 cm. How many such small balls can be made?
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19 questions
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A metallic sphere of diameter 40 cm is melted into smaller spheres of radius 0.5 cm. How many such small balls can be made?
If a + b + c = 9 and ab + bc + ca = -22, then the value of a3 + b3 + c3 - 3abc is:
ABC is an equilateral triangle. P, Q and R are the midpoints of sides AB, BC and CA, respectively. If the length of the side of the triangle ABC is 8 cm, then the area of ▲PQR is:
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A student takes 1.25 hours to travel from home to school at a speed of 4km/hr. By what percentage should he increase his speed to reduce the time by 25% to cover the same distance from school to home?
If 3a = 27b = 81c and and abc = 144, then the value of 12[1/a + 1/2b + 1/5c] is:
If the following table, the production of various crops is given from 2015 to 2019. Study the table and answer the questions that follow. The average production of wheat in the period given in the table is:
What will be the difference in compound interest on a sum of 7800 at 8% for 1 year, when the interest is paid yearly and half yearly?
If a sum of Rs. 1180 is to be divided among A, B and C, such that 2 times A's share, 5 times B's share and 7 times C's share, are equal, then A's share is:
If the following table, the production of various crops is given from 2015 to 2019. Study the table and answer the questions that follow. The difference between the average production of barley and average production of rice is:
If the following table, the production of various crops is given from 2015 to 2019. Study the table and answer the questions that follow. The highest growth of sugarcane production over its previous year is recorded in the year:
If the area of an equilateral triangle is 36√3 cm2 ,then the perimeter of the triangle is:
If the following table, the production of various crops is given from 2015 to 2019. Study the table and answer the questions that follow. The percentage growth of maize in the year 2019 over the year 2015 is:
A circular disc of area 0.64π m2 rolls down a length of 1.408 km. The number of revolutions it makes is:
The average of the marks of 30 boys is 88, and when the top two scores were excluded, the average marks reduced to 87.5. If the top two scores differ by 2, then the highest mark is:
A shopkeeper marks the price of an article in such a way that after allowing a discount of 22%, he get a gain of 11%. If the marked price is Rs. 888, then the cost price of the article is:
An article was sold at a gain of 18%. If it had been sold for Rs. 49 more, then the gain would have been 25%. The cost price of the article is: