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SSC CHSL 2021 PYQ — Question 58

SSC CHSL - 13 April 2021 - Shift 2 • Quantitative Aptitude • Q58

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Comprehension:
In the following passage, some words have been deleted. Fill in the blanks with the help of the
alternatives given. Select the most appropriate option for each blank.
Graduation Day was at hand. Primary school graduation (1) ______ in those days followed a
prescribed order-conventional, courteous and (2) ______. First the school principal made a
long speech (3) ______ encouragement and blessing for the future of the graduates. (4) ______
one of the representatives of the graduating class (5) ______ with a vote of thanks.

A sum of Rs 2,432 amounts to Rs 2,681.28 in 2 years at a certain rate per cent per annum, interest compounded yearly. What will be the simple interest (in Rs.) on the same sum for 438\frac{3}{8} years at double the same rate?

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 1,064

 

Amount = Principle (1 + r/100)n

⇒ 2681.28 = 2432 (1 + r/100)2

⇒ 2681.28/2432 = [(100 + r)/100]2

⇒ 441/400 = [(100 + r)/100]2

√441/400 = (100 + r)/100

⇒ 21/20 = (100 + r)/100

⇒ 105 = 100 + r 

⇒ r = 5%

Simple Interest on Rs.2432 at 10% p.a. for 4384\frac{3}{8} years. 

⇒ SI = 2432 × 10/100 × 35/8