Question

QUESTION 1) If a + b = 8 and ab = 6, the value of a³ + b³ is: *

416

368

464

656

QUESTION 2) The factorisation of 64a³b³ ─ 27 is: *

(4ab ─ 3) (16a²b² + 12ab + 9)

(4ab ─ 3) (16a²b² ─ 24ab + 9)

(4ab ─ 3) (16a²b² ─ 12ab + 9)

(4ab ─ 3) (16a²b² + 24ab + 9)

*



0

-5/2

1/3

4/3

Question 4 : A train covered a certain distance at a uniform speed. If the train had been 6 km/h faster, it would have taken 4 hours less than the scheduled time. And, if the train were slower by 6 km/h, it would have taken 6 hours more than the scheduled time. The length of the journey is: *

360 Km

1080 Km

432 Km

720 Km

Question 5 : The bisector of angle A of triangle ABC meets BC at D such that AD is perpendicular to BC. If AB = (2x + y) cm, BD = (3x + 1) cm, BC = (3x + 2y ─ 1) cm and AC = (8x ─ y) cm, then the values of x and y are: *

x=3,y=1

x=2,y=2

x=1,y=3

x=1,y=1

*



a=1,b=-2

a=-6,b=3

a=-2,b=1

a=3,b=-6

Question 7 : Rishi invested RS. 30,000 in a finance company which amounts to RS.39,930 after 3/2 years. If the interest is compounded semi-annually, the rate of interest per annum is: *

5%

10%

15%

20%

*



3

5

2

13/3

Question 9 : If (─4, 0) and (4, 0) are two vertices of an equilateral triangle, the coordinates of its third vertex are: *



Option 1

(0,0)



Option 3

(0,2)or(0,-2)

Question 10 : A ladder is placed leaning against a vertical wall such that its foot is 6 m away from the base of the wall and its top reaches the wall at a point 8 m above the ground. If the bottom of the ladder is pulled away from the wall, along the ground, in such a way that its foot is now 8 m away from the base of the wall, then the height of the point on the wall where the top of the ladder reaches is: *

2 m

10 m

6 m

9.8 m

Question 11) In triangle ABC, AB=3 cm, BC= 4 cm and CA=5 cm. If D and E are mid-points of AB and BC respectively, then the length of DE is: *

1.5 cm

2 cm

2.5 cm

3.5 cm

Question 12) The lengths of the diagonals of rhombus are 16 cm and 12 cm. The length of the side of rhombus is: *

9 cm

10 cm

8 cm

20 cm

Question 13) The compound interest on RS.1000 at 10% p.a. compounded annually for 2 years is: *

Rs.190

Rs.200

Rs.210

Rs.1210
can anyone answer all these questions ​

Answer 1

answer:

2)64a³b³-27

(4ab)³-(3)³

(4ab-3)(16a²b²+12ab+9)

plz mark the brain liest

thank you!

Answer 2

Answer:

answer:

2)64a³b³-27

(4ab)³-(3)³

(4ab-3)(16a²b²+12ab+9)

plz mark the brainliest

thank you!

Step-by-step explanation: