Mathematics Past Questions

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811

A cuboid of base 12.5cm by 20cm holds exactly 1 litre of water. What is the height of the cuboid? (1 litre =1000cm3)

A. 2cm
B. 4cm
C. 5cm
D. 8cm
E. 10cm

View Answer & Discuss WAEC 1994

812

Two ships on the equator are on longitudes 45oW and 45oE respectively. How far are they apart along the equator, correct to 2 significant figures? (Take the radius of earth = 6400km and π = 22/7)

A. 15,000km
B. 10,000km
C. 6,400km
D. 5,000km
E. 3,200km

View Answer & Discuss (3) WAEC 1994

813

Calculate, correct to 2 significant figures, the length of the arc of a circle of radius 3.5cm which subtends an angle of 75° at the centre of the circle. [Take π = 22/7].

A. 2.3cm
B. 4.6cm
C. 8cm
D. 16cm
E. 110cm

View Answer & Discuss (1) WAEC 1994

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814

A circle has radius x cm. What is the area of a sector of the circle with angle 135°, leaving the answer in terms of x and π?

A. \( \frac{\pi x^2}{8} \)
B. \( \frac{3\pi x^2}{8} \)
C. \( \frac{5\pi x^2}{8} \)
D. \( \frac{3\pi x}{8} \)

View Answer & Discuss (1) WAEC 1994

815

In the diagram, PQRS is a trapezium with PQ||SR. STR is a straight line, PSHQT, PTHQR. If |PQ| = 12cm and the height of the trapezium is 9cm, find its area.

A. 96cm²
B. 108cm²
C. 135cm²
D. 162cm²
E. 216cm²

View Answer & Discuss (3) WAEC 1994

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