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The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor,if the cost per `m^2` is Rs

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

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There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to

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

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Simplify and express the result in power notation with positive exponent. `(3^(– 7) ÷ 3^(– 10)) xx 3^(– 5)`

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

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `(a – b)^2 – (b –

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

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If `a^2 + b^2 = 74` and ab = 35, then find a +

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

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Long back in ancient times, a farmer saved the life of a king’s daughter. The king decided to reward the farmer with whatever he wished. The farmer, who was a chess champion, made an unusal request: “I would like you to place 1 rupee on the first square of my chessboard, 2 rupees on the second square, 4 on the third square, 8 on the fourth square, and so on, until you have covered all 64 squares. Each square should have twice as many rupees as the previous square.” The king thought this to be too less and asked the

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

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When a die is thrown, list the outcomes of an event of getting(i) (a) a prime number (b) not a prime number. (c) a number greater than 5 (d) a number not greater than

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

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Without adding, find the sum. 1 + 3 + 5 + 7 + 9 + I1 + 13 + 15 + 17

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

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Three consecutive integers add up to 51. What are these

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

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The sum of three consecutive multiples of 8 is 888. Find the

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

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Aman’s age is three times his son’s age. Ten years ago he was five times his son’s age. Find their present

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

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The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find their present

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

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Find the number of sides of a regular polygon whose each exterior angle has a measure of

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

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Express the following numbers in usual form. `3 xx 10^(–

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

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Express the following numbers in usual form. `4.5 xx

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

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One Fermi is equal to `10^(–15)` metre. The radius of a proton is 1.3 Fermis. Write the radius of a proton in metres in standard

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

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The value of a car, bought for Rs 4,40,000 depreciates each year by 10% of its value at the beginning of that year. So its value becomes Rs 3,08,000 after three

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

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The per cent of pure gold in 14 carat gold is about 58.3%. A 14 carat gold ring weighs 7.6 grams. How many grams of pure gold are in the

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

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If xy = 10, then x and y vary ______ with each

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

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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

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

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