Question

1. Evaluate (3.2 × 6y3) × (2.1x2y2) when x = 1 and y = 0.5.


2. Express the product of (-xy3) × (yx3) × (xy) as a monomials and verify the

result for x = 1, y = 2


3. Find the volume in cubic meter (cu .m ) of the cuboid

whose dimensions are : Length = 12 m, Breadth = 10 m ,

height = 4.5 m


4. Find the volume in cubic decimeter of the cube whose side is 75 cm.


5. How much clay is dug out in digging a well measuring 4 m by 2 m by 5 m?


6. How many bricks will each of size 25 cm x 10 cm x 8 cm be required to

build a wall 5 m long, 3 m high & 16 cm thick, assuming that the volume of

sand and cement used in the construction is negligible?


7. Four-fifth of a number is more than three-fourth of the same number by 4.

Find the number.


8. The difference between the squares of two consecutive numbers is 31. Find

the numbers.


9. Sunita is twice as old as Ashima. If six years is subtracted from Ashima’s

age and four years added to Sunita’s age, then Sunita will be four times

Ashima’s age. How old were they two years ago?


10.A coolie deposits Rs.150 per month in his post office savings bank

account. If this is 15% of this monthly income, find his monthly income.


11. Sita can finish typing work of 100 page document in 9 hours, Mita in 6

hours and Rita in 12 hours. How long will they take to type a 100 page

document, if they work together?


12. Factorize : - 40 + 3x – x2


13. By what number should (5/3)-2 be multiplied so that the product will be

(7/3)-1?


14. Find the value of x for which 52x ÷ 5-3 = 55.​

Answer 1

Answer:

for the boxes chosen by you check if the smaller boxes fit into the larger box. If yes, what is the volume vacant in the large box. If no, by how much does the volume of the smaller boxes Exceed that of the larger box

Step-by-step explanation:

79 × 49.7/100 + 81 × 50.3/100

3926.3 + 40743 = 80.006 = 80uentries 4, 5, 6, 7. Column 2 is labeled Tally with entries 4, 5, 3, 4..600. keeping 10 items for himself, he sold