Question

A man travelled a distance of 50 km in 8 hours. He travelled partly on foot at 5 km/hr and partly on bicycle at 7 km/hr. What is the distance (in kms) travelled on foot?

A) 20 B) 25 C) 15 D) 30

Answer 1

Step-by-step explanation:

Let x be the distance travelled by foot and

Y be the distance travelled by bicycle

Given that , the total distance travelled by a man is 50 km in 8 hours , partly on foot and on bicycle

So, the first equation is x+y=50………..(1)

We know that the formula, time =distance/speed

So , x/5+y/7=8hours or 7x+5y=280….(2)

By solving these two equations we get the distance travelled by man on foot

Therefore, the distance travelled by a man on foot is 15km

Answer 2

Answer:

• Let x be the distance travelled by foot and
• Y be the distance travelled by bicycle

Given that

, the total distance travelled by a man is 50 km in 8

hours , partly on foot and on bicycle

So, the first equation is x+y=50………..(1)

We know that the formula,

time =distance/speed

So , x/5+y/7=8hours

or 7x+5y=280….(2)

By solving these two equations we get the distance travelled by man on foot

Therefore, the distance travelled by a man on foot is 15km

$hope \: its \: help \: u$