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The thickness of a hollow metallic cylinder is 2 cm. It is 70 cm long with outer radius of 14 cm. Find the volume of the metal used in making the cylinder, assuming that it is open at both the ends. Also find its weight if the metal weighs 8 g per

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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A river 2 m deep and 45 m wide is flowing at the rate of 3 km per hour. Find the amount of water in cubic metres that runs into the sea per

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `x^2 – 6x +

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `x^2 + 9x +

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `51x^3y^2z -:

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `17ab^2c^3 -:

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Factorise the expressions and divide them as directed: `(3x^4 – 1875) -: (3x^2 –

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle.

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Verify the following: `(a + b + c) (a^2 + b^2 + c^2 – ab – bc – ca) = a^3 + b^3+ c^3 –

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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Find the value of a, if `8a = 35^2 –

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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Find the value of a, if `pqa = (3p + q)^2 – (3p –

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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Find the value of (i) `(6.25 6.25 –1.75 1.75)/4.5` (ii) `(198 198 –102

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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In `2^n`, n is known

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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The value of `3^5 -: 3^(–6)`

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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The reciprocal of `(2/5)^-1`

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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The multiplicative inverse of `(-5/9)^-99`

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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If x be any non-zero integer and m, n be negative integers, then `xm xx xn` is equal

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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Which of the following is equal to `(-3/4)^(-3)`

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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`(-5/7)^(-5)` is equal

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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For a non-zero integer x, `x^7 -: x^12` is equal

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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