#### Question

MCQ

A car driver increases the average speed of his car by 3 km/hr every hour. The total distance travelled in 7 hours if the distance covered in the first hour was 30 km, is

#### Options

266 km

273 km

280 km

287 km

#### Solution

**273 km**

**Explanation:**

Speed of car in 1^{st} hours `30/1` = 30 km/h

Speed of the car in 2^{nd} hour = 30 + 3 = 33 km/hr

Distance covered in 2^{nd }hour = 33 km

Speed of the car in 3^{rd} hour = 33 + 3 = 36 km/hr

Distance covered in 3^{rd} hour = 36 km

Similarly, distance travelled in 4^{th}, 5^{th}, 6^{th} and 7^{th} hours are 39 km, 42 km, 45 km, and 48 km

total distance travelled in 7 hours

= 30 + 33 + 36 + 39 + 42 + 45 + 48 = 273 km

Concept: Time, Distance and Speed(Entrance Exam)

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