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A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the

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The mass of an aluminium rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105

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If a and b vary inversely to each other, then find the values of p, q, r ; x, y, z and l, m, n. a l 9 n 6 b 5 m 25 10

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44 cows can graze a field in 9 days. How many less/more cows will graze the same field in 12

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30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10

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The variable x is inversely proportional to y. If x increases by p%, then by what per cent will y

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Kusum always forgets how to convert miles to kilometres and back again. However she remembers that her car’s speedometer shows both miles and kilometres. She knows that travelling 50 miles per hour is same as travelling 80 kilometres per hour. To cover a distance of 200 km, how many miles Kusum would have to

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If R is the radius of the base of the hat, then the total outer surface area of the hat is

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A three-digit number 42x is divisible by 9. Find the value of

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Write the additive inverse of each of the following.

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Find the square of the following numbers.

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Find the square roots of the following numbers by the Prime Factorisation Method.

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

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