Question

Hᴇʟʟᴏ Bʀᴀɪɴʟɪᴀɴs !!

1) A car moves with a speed of 40 km/h for 15 mins and then with a speed of 60 km/h for next 15 mins . The total distance covered by the car is : _________

(a) 100km. (b) 25km
(c) 15km. (d) 10km

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Answer 1

Answer:

25 km

Explanation:

                                  Distance = speed * time

We have change time which are given in minutes to hour. As the speed is mentioned in kilometre per hour.

For part A:

$\rightarrow Distance = speed * time$

$\hookrightarrow Distance = 40 * \frac{15}{60}$

$\hookrightarrow Distance = 10$ km

For part B:

$\rightarrow Distance = speed * time$

$\hookrightarrow Distance =60 * \frac{15}{60}$

$\hookrightarrow Distance = 15$ km

Total distance covered:

part A + part B

10 km + 15 km

25 km

Answer 2

Answer :-

25 km

Solution :-

Speed of the car in first 15 mins ,

The car is moving in the speed of 40 km/h for 15 mins.

• Distance covered = speed × Time taken
• Distance covered = 240 × 15/60 = 10 km

Speed of car in next 15 mins ,

again ,

• distance covered = 60 × 15/60 = 15km

now , total distance covered = ( 10 + 15 ) km = 25 km

Hope it helps~