Question

3. Mary cycles at 6 km per hour. How
long will she take to reach her Aunt's
house which is 12 km away? If she
cycles at a speed of 4 km/hr, how long
would she take ? So ,there is inverse proportion​

Answer 1

Answer:

a)2 hours b)3 hours

Step-by-step explanation:

refer to the photo

Answer 2

Answer:

$sloution$

Speed and the time take to cover a distance are in inverse proportion

Let marry take x hours to cover 12 km at the speed of 6km/hr and y hour to cover the same distance at 4km/hr.

Speed = 6 km/ h

4 km / h

Time =

$x \: hours \\ y \: hours$

Distance =

$12km \\ 12km$

Speed × time = distance

$6 \times x = 12$

$x = \frac{12}{6} {}^{2}$

$x = 2$

$4 \times y = 12 \\ y = \frac{12}{4}$

$y = \frac{12}{4} {3}^{}$

$y = 3$

Ans: Marry take 2 hours at the speed of 6km/h and 3 hours at the speed of 4 km/h