Question

8. A man covers first 48 km of his journey in 40 minutes and next 32 km in 30 minutes. Find his average speed.
O 44 km/hr
O 54 km/hr
O 64 km/hr
O None of these​

Answer 1

Answer:

64 km/hr

Explanation:

The Correct answer is (C)

Hope It helps you

Answer 2

Answer:

The correct answer of this question is 64 km/hr.

Step-by-step explanation:

Given - A man covers first 48 km of his journey in 40 minutes and next 32 km in 30 minutes.

To Find - Find his average speed.

The overall distance travelled by the object in a given time frame is the average speed. A scalar quantity is average speed. It has no direction and is indicated by the magnitude.

The average speed is 64 km/hr.

A man covers first $48$ km of his journey in $40$ minutes and next $32$ km in $30$minutes.

Use the formula-

Average speed = Total distance covered / Total time taken to cover the distance.

Total distance = $48 + 32 = 80km$

Total time  = $40 + 35 = 75min$  = $\frac{75}{60} hrs$

Average speed = $\frac{80}{\frac{75}{60} }$

$\frac{80}{75}$ × $60$ = $\frac{4800}{75}$ = $64km /hr$

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