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# A car covers a distance in 40 minutes with an average speed of 60 km per hour. The average speed to cover the same distance in 30 minutes is

(a) 80 km/h

(b) 45/2 km/h

(c) 70 km/h

(d) 45 km/h

**Solution:**

Average speed of the car = 60 Km/hour

Distance covered in 40 minutes = 60 × (40/60) Km = 60 × (2/3) = 40 km

Speed required to cover 40 km in 30 minutes = 40/(30/60) = (40 × 60)/30 Km/h = 80Km/hour

The answer is (a)

**✦ Try This: **A car covers a distance in 30 minutes with an average speed of 56 km per hour. The average speed to cover the same distance in 24 minutes is (a) 80 km/h, (b) 45/2 km/h, (c) 70 km/h, (d) 45 km/h

Average speed of the car = 56 Km/hour

Distance covered in 30 minutes = 56 × (30/60) Km = 56× (1/2) = 28 km

Speed required to cover 40 km in 30 minutes = 28/(15/60) = (28 × 60)/24 Km/h = 70Km/hour

Answer is (c).

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

**NCERT Exemplar Class 8 Maths Chapter 10 Sample Problem 2**

## A car covers a distance in 40 minutes with an average speed of 60 km per hour. The average speed to cover the same distance in 30 minutes is (a) 80 km/h, (b) 45/2 km/h, (c) 70 km/h, (d) 45 km/h

**Summary:**

A car covers a distance in 40 minutes with an average speed of 60 km per hour. The average speed to cover the same distance in 30 minutes is 80 Km /hour

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