A sprinter tracks a 400-meter oval dash stretch in 44 seconds. Find his approximate pace in km/h. MCQ with Answer and Explanation

A sprinter tracks a 400-meter oval dash stretch in 44 seconds. Find his approximate pace in km/h.

A. 30.5 km/h

B. 36.0 km/h

C. 32.7 km/h

D. 34.2 km/h

Answer: Option C

Speed = 400 / 44 m/s = 100 / 11 m/s. In km/h = (100 / 11) * (18/5) = 360 / 11 = 32.72 km/h.

This question belongs to: Maths Time Speed and Distance

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Question #1 Report Error

A vessel tracks upstream at 10 km/h and downstream at 18 km/h. Find the net speed of the river current.

A. 5.0 km/h

B. 3.5 km/h

C. 4.5 km/h

D. 4.0 km/h

Correct Answer: Option D

Explanation:
Speed of river current = (Downstream speed - Upstream speed) / 2 = (18 - 10) / 2 = 8 / 2 = 4 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2 Report Error

A train 120 meters long passing a warehouse platform 280 meters long takes exactly 20 seconds. Find the velocity index of the train in km/h.

A. 64 km/h

B. 80 km/h

C. 72 km/h

D. 84 km/h

Correct Answer: Option C

Explanation:
Total distance = 120 + 280 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3 Report Error

A sound wave travels at 340 m/s. How much distance in kilometers does it cover in exactly 15 seconds?

A. 5.7 km

B. 5.1 km

C. 5.4 km

D. 4.8 km

Correct Answer: Option B

Explanation:
Distance = Speed * Time = 340 * 15 = 5100 meters. Converting to kilometers = 5100 / 1000 = 5.1 km.

This question belongs to: Maths Time Speed and Distance