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Q:

A tower is 50 meters high.Its shadow is x metres shorter when the sun's altitude is 45° than when it is 30° . The value of x in metres is

A) 50√3 B) 50 (√3 -­ 1)
C) 50 (√3 + 1) D) 50
 
Answer & Explanation Answer: B) 50 (√3 -­ 1)

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Filed Under: Height and Distance
Exam Prep: Bank Exams

Q:

If Sin 31° = xy, then the value of Sec 31° - Sin 59° is

A) x2yy2-x2 B) -x2yy2-x2
C) -y2y2-x2 D) x
 
Answer & Explanation Answer: A) x2yy2-x2

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Filed Under: Simplification
Exam Prep: Bank Exams

Q:

O is the centre of a circle and AB is the tangent to it touching at B . If OB = 3 cm. and OA = 5 cm , then the measure of AB in cm

A) √34 B) 2
C) 8 D) 4
 
Answer & Explanation Answer: D) 4

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

Q:

The average of 100 observations was calculated as 35.It was found later, that one of the observation was misread as 83 instead of 53. The correct average is :

A) 32.7 B) 34.7
C) 35.7 D) 36.7
 
Answer & Explanation Answer: B) 34.7

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Filed Under: Simplification
Exam Prep: Bank Exams

Q:

BE and CF are two altitudes of a triangle ABC. If AB = 6 cm , AC = 5 cm and CF = 4 cm , then the length of BE is

A) 4.8 cm B) 7.5 cm
C) 3.33 cm D) 5.5 cm
 
Answer & Explanation Answer: A) 4.8 cm

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

Q:

The simple interest on a certain sum of money at the rate of 5% per annum for 8 years is Rs. 840 . Rate of interest for which the same amount of interest can be received on the same sum after 5 years is

A) 7% B) 8%
C) 9% D) 10%
 
Answer & Explanation Answer: B) 8%

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Filed Under: Simple Interest
Exam Prep: Bank Exams

Q:

A basket contains 300 mangoes . 75 mangoes were distributed among some students . Find the percentage of mangoes left in the basket

A) 70% B) 72%
C) 76% D) 75%
 
Answer & Explanation Answer: D) 75%

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Filed Under: Percentage
Exam Prep: Bank Exams

Q:

The ratio of number of boys and girls in a school of 720 students is 7 : 5 . How many more girls should be admitted to make the ratio 1 : 1 ?

A) 90 B) 120
C) 220 D) 240
 
Answer & Explanation Answer: B) 120

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams