Question

A man reaches his office from his residence in 10 min walking at the rate of 6 km oer hour . How long willhe take if he walk at a rate of 8 km per hour?

Answer 1

Answer:

$\bigstar{Time\:taken\:=\:448.6s\:or\:7.5\:min}$

Step-by-step explanation:

Given:

• Speed = 6km/hr=1.66m/s
• Time taken = 10min=600s

To Find:

• Time it takes if the man walked at the rate of 8km/hr

Solution:

→ First let us find the distance between his office and residence

→ Distance is given by the equation

  Distance = Speed×Time

→ Substituting the given datas, we get

  Distance = 1.66×600

  Distance = 996m

→ Time taken if the man walked at 8km/hr or 2.22m/s is given by

   Time = Distance/Speed

→ Substitute the given datas, we get

   Time = 996/2.22

   $\boxed{Time\:taken\:=\:448.6s\:or\:7.5\:min}$

   

Notes:

• Remember to convert all the given datas to their SI units before calculating.

• Speed is defined as the distance covered per unit time. It's unit is m/s
• Speed=Distance/Time
• Speed is a scalar quantity.