Question

3
Find the distance covered by a train moving at 80 km/hour in 12 hours,
km/hour. How far will she travel in 3
4. A boy walks from his house to his school. If he walks at a speed of 22 km per hour, he
reaches his school in 30 minutes. How far is the school from his house?
Find the distance betwee
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Answer 1

$\huge {\blue {\boxed {\green {\boxed {\mathsf {\red { QUESTION - } }}}}}}$

1). Find the distance covered by a train moving at speed of 80 km/h in 12 hours. How far she will travel in 3 more hours with same speed.

2). A boy walks from his house to his school. If he walks at a speed of 22 km/h, he reaches school in 30 minutes. How far is the school from his house? Find the distance between his house and his school.

$\huge {\green {\boxed {\blue {\boxed {\mathbf {\pink { ANSWER -} }}}}}}$

1). Speed of train = 80 km/h

Time taken by train = 12 hrs

Distance covered by the train = speed × time

(80 × 12) km

= 960 km

If time is 3 hours more and speed is same, then,

Time = 12 + 3 = 15 hrs

Speed = 80 km/h

Distance= speed × time = (80 × 15) km

= 1200 km

2). Speed of that boy = 22 km/h

Time taken by him to reach his school = 30 minutes = $\frac {1}{2}$ hrs

Distance between his house and the school =

speed × time

(22 × $\frac {1}{2}$ ) km

= 11 km

So, school is 11 km far from the boy's house.

$\huge {\red {\boxed {\blue {\boxed {\mathfrak {\orange { Some \: Formulas} }}}}}}$

• Distance = Speed × Time
• Speed = Distance ÷ Time
• Time = Distance ÷ Speed