0
Q:

What is the compound interest earned at the end of 3 years?

I. Simple interest earned on that amount at the same rate and for the same period is Rs. 4500.

II.The rate of interest is 10 p.c.p.a.

III.Compound interest for 3 years is more than the simple interest for that period by Rs.465.

A) I and II only B) II and III only
C) I and III only D) Either II or III only

Answer:   D) Either II or III only



Explanation:

 

 

 

 

 

 

I. gives, S.I for 3 years = Rs. 4500.

 

 

 

II. gives, Rate = 10% p.a.

 

 

 

III. gives, (C.I.) - (S.I.) = Rs. 465.

 

 

 

Clearly, using I and III we get C.I. = Rs. (465 + 4500).

 

 

 

Thus, II is redundant.

 

 

 

Also, from I and II, we get sum =

 

 

 

100 x 4500

 

 

 

= 15000.

 

 

 

10 x 3

 

 

 

Now C.I. on Rs. 15000 at 10% p.a. for 3 years may be obtained.

 

 

 

Thus, III is redundant.

 

 

 

Either II or III is redundant.

Q:

The diagonal of a square is 10√2 cm, find its perimeter?

A) 160 cm B) 80 cm
C) 20 cm D) 40 cm
 
Answer & Explanation Answer: D) 40 cm

Explanation:
Report Error

View Answer Report Error Discuss

0 761
Q:

Find the sum of the measures all the exterior angles of a decagon.

A) 720° B) 2160°
C) 360° D) 1800°
 
Answer & Explanation Answer: C) 360°

Explanation:
Report Error

View Answer Report Error Discuss

0 643
Q:

Find equation of the perpendicular to segment joining the points A(0,4) and B(-5,9) and passing through the point P. Point P divides segment AB in the ratio 2:3.

A) x - y = 8 B) x - y = -8
C) x + y = -8 D) x + y = 8
 
Answer & Explanation Answer: B) x - y = -8

Explanation:
Report Error

View Answer Report Error Discuss

0 711
Q:

If a cone of radius 10.5 cm and height 12 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder?

A) 8 cm B) 6 cm
C) 4 cm D) 2 cm
 
Answer & Explanation Answer: C) 4 cm

Explanation:
Report Error

View Answer Report Error Discuss

0 749
Q:

If cosecA - cotA = x, then the value of x is

A) sinA/(1 - cosA) B) √[sinA/(1 + cosA)
C) sinA/(1 + cosA) D) √[sinA/(1 - cosA)]
 
Answer & Explanation Answer: C) sinA/(1 + cosA)

Explanation:
Report Error

View Answer Report Error Discuss

1 1098
Q:

If (1 - cosA)/2 = x, then the value of x is

A) cos^2(A/2) B) √sin(A/2)
C) √cos(A/2) D) sin^2(A/2)
 
Answer & Explanation Answer: D) sin^2(A/2)

Explanation:
Report Error

View Answer Report Error Discuss

0 1094
Q:

If cos 60° - sec 30° = x, then the value of x is

A) 1 B) (√3+√2)/2
C) (√3-4)/2√3 D) 1/√2
 
Answer & Explanation Answer: C) (√3-4)/2√3

Explanation:
Report Error

View Answer Report Error Discuss

0 762
Q:

The value of tan80° tan10° + sin270° + sin20

A) 0 B) 1
C) 2 D) 32
 
Answer & Explanation Answer: C) 2

Explanation:
Report Error

View Answer Report Error Discuss

0 979