SSC CGL 2019 tier 1 Questions and Answers Detailed Explanation

Question : 1

If A lies in the first quadrant and 6tanA = 5, then the value of ${8sinA - 4cosA}/\text"cosA + 2sinA"$ is:

a) 1

b) -2

c) 4

d) 16

Question : 2

If the length of a rectangle is increased by 40%, and the breadth is decreased by 20%, then the area of the rectangle increases by x%. Then the value of x is:

a) 20

b) 8

c) 16

d) 12

Question : 3

A shopkeeper marks the price of the article in such a way that after allowing 28% discount, he wants a agin of 12%. If the marked price is Rs. 224, then the cost price of the article is:

a) Rs. 168

b) Rs. 120

c) Rs. 196

d) Rs. 144

Question : 4

The ratio of the number of boys to the number of girls in a school of 640 students, is 5 : 3. If 30 more girls are admitted in the school, then how many more boys should be admitted so that the ratio of boys to that of the girls, becomes 14 : 9.

a) 20

b) 25

c) 30

d) 15

Question : 5

A train crosses a pole in 12 sec, and a bridge of length 170 m in 36 sec. Then the speed of the train is:

a) 30.75 km/h

b) 10.8 km/h

c) 25.5 km/h

d) 32.45 km/h

Question : 6

If A + B = 45°, then the value of 2(1 + tanA)(1 + tanB) is:

a) 2

b) 0

c) 4

d) 1