Question 756:

• JAMB 1993

Two mirrors M1 and M2 are inclined at right angles as shown above calculate the angle of reflection of the ray of light at M2

A. \( 30^{\circ} \)
B. \( 45^{\circ} \)
C. \( 60^{\circ} \)
D. \( 90^{\circ} \)

Question 757:

• JAMB 1993

The current I in the fig above is

A. 4.00A
B. 1.30A
C. 0.80A
D. 0.75A

Question 758:

• JAMB 1994

If it takes 5.0 hrs to drain a container of 540.0cm³ of water, what is the flow rate of water from the container in kg^-1? [Density of water = 1000kgm^-3]

A. 32.5kg^-1 s
B. 31.5kg^-1
C. 30.8kg^-1 s
D. 30.0kg^-1 s

Question 759:

• JAMB 1994

If it takes 5.0 hrs to drain a container of 540.0cm³ of water, what is the flow rate of water from the container in kg^-1? [Density of water = 1000kgm^-3]

A. 32.5kg^-1 s
B. 31.5kg^-1
C. 30.8kg^-1 s
D. 30.0kg^-1 s

Question 760:

• JAMB 1994

A boat travels due east at a speed 40ms^-1s across a river flow due south at 30ms^-1s. What is the resultant speed of the boat?

A. 1.3ms^-1
B. 10.0ms^-1
C. 50.0ms^-1
D. 70.0ms^-1