NECO Mathematics Past Questions & Answers - Page 13

61.

A surveyor measured the length of a obtained 42.55 metres. If his measurement was more than the actual length and the percentage error of his measurement was 8%, calculate the actual length of the land

A.

39.40 metres

B.

46.20 metres

C.

46.25 metres

D.

46.50 metres

E.

48.25 metres

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

62.

Solve for x in the quadratic equation. 2x² + 12x + 10 = 0

A.

x = -5, -1

B.

x = -5,1

C.

x = -3, -2

D.

x = 3, 2

E.

x = 6, 5

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

63.

Find the Iength of a diagonal of a square whose area is 288cm².

A.

24cm

B.

48cm

C.

95cm

D.

100cm

E.

124cm

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

64.

A flagpole is placed at the top of a tower. The angles of elevation of the bottom and top of the flagpole from a point on the ground 10m away are 40° and 50° respectively. Find the length of the flagpole.

A.

1.8m

B.

3.5m

C.

8.4m

D.

11.9m

E.

17.3m

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

65.

Find the value of 2a - b if a + b = 8 and 4a - b = 22

A.

2

B.

4

C.

6

D.

8

E.

10

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

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