424
Q:

If each edge of a cube is increased by 50%, find the percentage increase in Its surface area

A) 125% B) 150%
C) 175% D) 110%

Answer:   A) 125%



Explanation:

Let the edge = a cm   

So increase by 50 % = a + a/2 = 3a/2  

Total surface Area of original cube = 6a2  

TSA of new cube = 63a22 =69a24=  13.5a2   

Increase in area = 13.5a2-6a2 =7.5a2  

 7.5a2 Increase % =7.5a26a2×100 = 125%

Q:

The volume of a sphere is 179.67 cub.cm. Find its diameter (in cm).

A) 3.5 B) 14
C) 7 D) 10.5
 
Answer & Explanation Answer: C) 7

Explanation:
Report Error

View Answer Report Error Discuss

0 40
Q:

What is the sum of the measures of all the interior angles of a regular polygon of 5 sides?

A) 720 B) 1080
C) 1260 D) 540
 
Answer & Explanation Answer: D) 540

Explanation:
Report Error

View Answer Report Error Discuss

0 50
Q:

Consider the following two triangles as shown in the figure below.


Choose the correct statement for the above situation.

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:
Report Error

View Answer Report Error Discuss

0 43
Q:

Find the total surface area (in cm²) of a right circular cone of diameter 14 cm and slant height 10 cm.

 

A) 374 B) 570
C) 428 D) 524
 
Answer & Explanation Answer: A) 374

Explanation:
Report Error

View Answer Report Error Discuss

0 23
Q:

The length of the diameter of the circle is 10 cm and length of the chord drawn in a circle is 6 cm. Find the distance (in cm) of chord from the center.

 

A) 10 B) 8
C) 6 D) 4
 
Answer & Explanation Answer: D) 4

Explanation:
Report Error

View Answer Report Error Discuss

0 41
Q:

Find the curved surface area (in cm2) of a right circular cylinder of diameter 7 cm and height 6 cm.

A) 132 B) 110
C) 92 D) 154
 
Answer & Explanation Answer: A) 132

Explanation:
Report Error

View Answer Report Error Discuss

0 45
Q:

If the measure of the exterior angle of a regular polygon is 72 deg then how many sides does it have?
 

A) 6 B) 8
C) 9 D) 5
 
Answer & Explanation Answer: D) 5

Explanation:
Report Error

View Answer Report Error Discuss

0 50
Q:

In triangle ABC, O is the orthocenter and angle BOC is 120 deg. Calculate angle BAC.

A) 30 deg B) 40 deg
C) 60 deg D) 80 deg
 
Answer & Explanation Answer: C) 60 deg

Explanation:
Report Error

View Answer Report Error Discuss

0 50