Day 99: CDS Maths

5 questions. Try each one first, then open its answer.

Question 1
Trigonometric Ratios and Identities. Asked once: CDS 1 2022 (same type asked 5 times) See all 5 of this type
50 $y = \cos^2 x + \sec^2 x$
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Question 2
Mensuration 3D. Asked once: CDS 1 2018 (same type asked 5 times) See all 5 of this type
69 $A right circular cone is sliced into a smaller cone and a frustum of a cone by a plane perpendicular to its axis. The volume of the smaller cone and the frustum of the cone are in the ratio 64 : 61. Then their curved surface areas are in the ratio$
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Question 3
Mensuration 2D. Asked once: CDS 1 2020 (same type asked 5 times) See all 5 of this type
72 $If area of a circle and a square are same, then what is the ratio of their perimeters ?$
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Question 4
Time and Work. Asked once: CDS 2 2019 (same type asked 5 times) See all 5 of this type
40 $Tushar takes 6 hours to complete a piece of work, while Amar completes the same work in 10 hours. If both of them work together, then what is the time required to complete the work ?$
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Question 5
Averages. Asked once: CDS 2 2019 (same type asked 4 times) See all 4 of this type
68 $If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations ?$
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Question 1