Math Questions for SSC CHSL and RRB NTPC EXAM

Q7. sin⁡θ = 0.7, then cos⁡θ  0° ≤ θ<90° is
(a) 0.3
(b) √0.49
(c) √0.51
(d) √0.9

 Q9. A rectangular piece is 30m long and 24m wide. From its four corners, quadrants of radii 2.1 metres have been cut. The area of the remaining part (in metres square) is.
(a) 706.14
(b) 704
(c) 686.79
(d)  749.8

Q10. The perimeter of a rectangle is 160 meter and the difference of two sides is 48 meter. Find the side of a square whose area is equal to the area of this rectangle.
(a) 32 m
(b) 8 m
(c) 4 m
(d) 16 m

Q11. The length and breadth of a rectangular field are in the ratio 7 : 4. A path 4 m wide running all around outside has an area of 416 m^2. The breadth (in m) of the field is
(a) 28
(b) 14
(c) 15
(d) 16

Q12. What is the total area of three equilateral triangles inscribed in a semi-circle of radius 2 cm?
(a) 12 cm^2
(b) (3√3)/4  cm^2
(c) (9√3)/4  cm^2
(d) 3√3  cm^2

Q13. If side of a square  increased by 40%, the percentage increase in its surface area is
(a) 40%
(b) 60%
(c) 96%
(d) 80%

 

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