# If S denotes the 'area of the Curved surface of a right circular cone of height h and semi vertical angle a then S equals

1.  πh2 tan2α

2.  1/3 (πh2 tan2α)

3.  πh2secα tanα

4.  1/3(πh2secα tanα)

4

πh2secα tanα

Explanation :
No Explanation available for this question

# The ratio of the volume of a cube to that of sphere, which will exactly fit inside the cube, is

1.  6:

2.  4: ?

3.  5: 3 ?

4.  4: 3

4

6:

Explanation :
No Explanation available for this question

# A solid metallic sphere of radius 8 cm is meters to form 64 equal small solid spheres. The ratio .o the surface area of this sphere to that of a small sphere is

1.  4: 1

2.  1: 16

3.  16: 1

4.  1:4

4

16: 1

Explanation :
No Explanation available for this question

# The volume of the metal of a cylindrical pipe is 748 cm3. The length of the pipe is 14cm and it is external radius is 9 cm. Its thickness is (Taken = 22/7)

1.  1 cm

2.  5.2 cm

3.  2.3 cm

4.  3.7 cm

4

1 cm

Explanation :
No Explanation available for this question

# A does half as much as work as B in one-sixth of the time. If together  they take 10 days to complete a work, how much time shall B alone take to do it

1.  70 days

2.  30 days

3.  40 days

4.  50 days

4

40 days

Explanation :
No Explanation available for this question

# Two pipes can fill a tank with water in 15 and 12 hours respectively, and a third pipe can empty it in 4 hours. If the pipes be opened in order, at 8, 9 and 11 a.m. respectively, the tank will be emptied at

1.  11 : 40 a.m.

2.  12 : 40 p.m.

3.  1 : 40 p.m.

4.  2 : 40 p.m.

4

11 : 40 a.m.

Explanation :
No Explanation available for this question

# The percentage of loss when an article is sold at Rs. 50 is the same as that of the profit when it is sold at Rs. 70. The above-mentioned percentage of profit or loss on the article is

1.  10%

2.  16 2/3 %

3.  20%

4.  22 2/3 %

4

16 2/3 \%

Explanation :
No Explanation available for this question

# √(10+2√6+2√10+2√15) is equal to

1.  (√2+√3-√5)

2.  (√3+√5-√2)

3.  (√2+√5-√3)

4.  (√2+√3+√5)

4

(√2+√3+√5)

Explanation :
No Explanation available for this question

# If in a triangle ABC, B = 2?C and the bisector of ?B meets CA in D, then the ratio BD: DC would be equal to

3.  AB : AC

4.  AC : AB

4

AB : AC

Explanation :
No Explanation available for this question

1.  200

2.  250

3.  100

4.  150

4