Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed?

Solution:

Time Taken to reach School Speed at which distance is covered

20 minutes 6km/h

24 minutes x = ?

The lower the speed the more the time will be taken and it is an inverse variation. Therefore,

x = 6 × (20/24)

x = 20/4

x = 5km/h

Therefore Shabnam will take 24 minutes to reach school if she goes at a speed of 5 km/h.

✦ Try This: Shabnam takes 30 minutes to reach her school if she goes at a speed of 2 km/h. If she wants to reach school in 15 minutes, what should be her speed?

Time Taken to reach School Speed at which distance is covered

30 minutes 4km/h

15 minutes x = ?

The lower the speed the more the time will be taken. Therefore,

x = 2 × (30/15)

x = 4 km/h

Therefore Shabnam will take 15 minutes to reach school if she goes at a speed of 4 km/h.

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 13

NCERT Exemplar Class 8 Maths Chapter 10 Problem 89

Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed

Summary:

Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, then her speed should be 5 km/h

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