# Three solid metallic spheres of diameters 6 cm, 8 cm and 10cm are melted and recast into a new solid sphere. The diameter of the new sphere is:

1.  4 cm

2.  6 cm

3.  8 cm

4.  12 cm

4

12 cm

Explanation :
No Explanation available for this question

# If a : b = 2 : 3 andb : c = 4 : 5, find a2: b2: bc

1.  4 :9 :45

2.  16:36:45

3.  16 : 36 : 20

4.  4 : 36 : 40

4

16:36:45

Explanation :
No Explanation available for this question

# If (x + y -z)2+ (y + z - a)2+ (z +x - y)2= 0, then the value of x +y - z is

1.  √3

2.  3√3

3.  3

4.  0

4

0

Explanation :
No Explanation available for this question

# The moon’s distance from the earth is 360000 km and its diameter subtends an angle of 300at the eye of the observer. Find the diameter Of the moon.

1.  100πkm

2.  1000πkm

3.  200πkm

4.  2000 πkm

4

1000πkm

Explanation :
No Explanation available for this question

# The ratio of the numbers of boys and girls of a school with 504 students is 13 : 11. What will be the new ratio if 12 more girls are admitted

1.  91:81

2.  81:91

3.  9 : 10

4.  10 : 9

4

91:81

Explanation :
No Explanation available for this question

# A and B have monthlyincomes in the ratio 5 : 6 and monthly expenditures in the ratio 3 : 4. If Q they save Rs. 1800 and Rs. 1600 respectively, find the monthlyincomes of B:

1.  Rs. 3400

2.  Rs. 2700

3.  Rs. 1720

4.  Rs. 7200

4

Rs. 7200

Explanation :
No Explanation available for this question

# The sum of the squares of two positive numbers is 100 and difference of their squares is 28,Find the sum of the numbers:

1.  12

2.  13

3.  14

4.  15

4

14

Explanation :
No Explanation available for this question

# The L.C.M. of two numbers is1820 and their H.C.F is 26. If one number is 130 then the othe rnumber is:

1.  70

2.  1690

3.  364

4.  1264

4

364

Explanation :
No Explanation available for this question

# Two numbers are respectively20% and 50% of a third number.What percent is the first number of the second

1.  10%

2.  20%

3.  30%

4.  40%

4

40\%

Explanation :
No Explanation available for this question

1.  Rs. 15000

2.  Rs. 10500

3.  Rs. 10050

4.  Rs. 10000

4