NECO Past Questions and Answers - Page 127

632.

A man travels at a rate of 25m/sec. If he travels for 10½hrs, how many kilometres has he covered?

A.

262.5

B.

945

C.

970

D.

995

E.

1822.9

Correct answer is B

No explanation has been provided for this answer.

633.

The radii of two similar cylindrical jugs are in the ratio 3:7. Calculate the ratio of their volumes

A.

1 : 04

B.

3 : 07

C.

9 : 49

D.

0.086111111

E.

27 : 343

Correct answer is E

radius ratio volume

r = \(r^3\)

so that 

3 : 7 = \(3^3 : 7^3\) = 27 : 343

634.

Simplify the expression:  \(Log_{4}16\) +  \(Log_{3}27\) + \(Log_{8}4096\) 

A.

-9

B.

\(\frac{1}{3}\)

C.

\(\frac{1}{9}\)

D.

3

E.

9

Correct answer is E

WHERE:

\(Log_{4}16\) = 2

\(Log_{3}27\) = 3

\(Log_{8}4096\) = 4

: 2 + 3 + 4 = 9

635.

Find y if sin y = cos 48°

A.

21°

B.

24°

C.

42°

D.

48°

E.

102°

Correct answer is C

No explanation has been provided for this answer.