JAMB Mathematics Past Questions & Answers - Page 69

341.

\(\frac{0.00256 \times 0.0064}{0.025 \times 0.08}\)

A.

8.8 x 10\(^{-1}\)

B.

8.8 x 10\(^{-2}\)

C.

8.2 x 10\(^{-3}\)

D.

8.8 x 10\(^{3}\)

Correct answer is C

No explanation has been provided for this answer.

342.

How many times, correct to the nearest whole number, will a man run round a circular track of diameter 100m to cover a distance of 1000m?

A.

3

B.

4

C.

5

D.

6

Correct answer is A

In terms of distance, a circle has a total distance or perimeter of 2πr or πd

  Where r is radius and d is the diameter

  So perimeter = \(\frac{22}{7}\) x 100

  = 314.2857m

  To cover a distance of 1000m, he is going to round the circular track for \(\frac{1000}{314.2857}\) = 3.18

\(\approxeq\) 3 (to the nearest whole number)

343.

In the diagram, GI is a tangent to the circle at H. If EF||GI, calculate the size of ∠EHF

A.

126°

B.

72°

C.

54°

D.

28°

Correct answer is B

No explanation has been provided for this answer.

344.

A car uses one litre of petrol for every 14km. If one litre of petrol cost N63.00, how far can the car go with N900.00 worth of petrol?

A.

420Km

B.

405Km

C.

210Km

D.

200Km

Correct answer is D

since 1litre cost ₦63

  So ₦900 is the cost of \(\frac{900}{63}\) litres

  = 14.2857litres of petrol

nbsp; The car uses 1 litre for 14km

  So 14.2857 litres will be used for (14.2857 x 14)

  = 200km

  Answer is D

345.

A boy walks 800m in 20 minutes. Calculate his average speed in Km/H

A.

2.4

B.

4

C.

24

D.

6

Correct answer is A

No explanation has been provided for this answer.