Question

Set 38
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 ?​

Answer 1

Answer:

she will take 2 hours by the speed of 6kmper hour and 3 hours by speed of 4 km per hour

Answer 2

Hello mate..

Here Is Your Answer:

Case (i):

Given:

• Distance = 12km.
• Speed = 6 km/h.

TO FIND:

The time taken to reach her aunt's house.

SOLUTION:

We know that,

$\bold \green {speed = \frac{distance}{time \: taken} } \\ \bold \green{time \: taken = \frac{distance}{speed} }$

So,

$\bold{ \implies \frac{12}{6} } \\ \bold{ \implies 2}$

Therefore, time taken to reach her aunt's house at speed of 6 km/hr is 2 hours.

⠀

Case (ii):

Given:

• Distance = 12km.
• Speed = 4 km/hr.

TO FIND:

Time taken to reach her aunt's house at speed of 4 km/hr.

SOLUTION:

$\bold{time \: taken = \frac{distance}{speed} } \\ \bold{ \implies \frac{12}{4} } \\ \bold{ \implies 3}$

Therefore, The time taken to reach her aunt's house at speed of 4 km/hr is 3 hours.

⠀

HOPE THIS HELPS YOU...