Question

Q3. Solve by using Unitary method
Acar travels 90 km in 2 1/2 hours.
A) How much time is required to cover 30 km at the same speed?​

Answer 1

Answer:

0.8 hours or 48 minutes

Explanation:

Speed= distance covered / time

          = 90 km / 2.5 hours

          = 36 km/hour

Now,

Speed= distance covered / time

    36 = 30 / time

 time = 30 / 36

 time = 0.8 hours i.e., 48 minutes.