Question

A car covers half of distance at speed 50kmph and other half at speed 40 kmph find average speed

Answer 1

Answer:

Given:

Car covers 50 kmph for 1st half journey and then at 40 kmph for 2nd half journey.

To find:

Average speed

Definitions:

Average speed is the ratio of total distance to the total time taken.

Calculation:

Average speed

$= \frac{2s}{ \frac{s}{50} + \frac{s}{40} }$

$= \frac{2}{ \frac{1}{50} + \frac{1}{40} }$

$= \frac{50 \times 40 \times 2}{50 + 40}$

$= \frac{50 \times 40 \times 2}{90}$

$= 44.44 \: m {s}^{ - 1}$

So the final answer is 44.44 m/s.

Answer 2

Answer:

The Average speed:

$= \frac{2s}{ \frac{s}{50} \:+ \frac{s}{40} }$

$= \frac{2}{ \frac{1}{50}+\frac{1}{40} }$

$= \frac{50 \times 40 \times 2}{50 + 40}$

$= \frac{50 \times 40 \times 2}{90}$

$= {44.44ms}^{ - 1} .$

ANSWER = 44.44m/s.

#answerwithquality #BAL.