Question

Rajesh travelled some distance by cycle at a speed of 15 km per hour. On return journey, he
travelled the same distance at a speed of 10 km per hour. What was his average speed per
hour during the entire journey?
fat 12.5 km per hour
(b) 13 km per hour
(c) 12 km per hour
(d) 15 km per hour

Answer 1

Answer:

a) 12.5 km per hr

Step-by-step explanation:

average =a+b

---------

2

.

. . 15+10/2

25/2

= 12.5

Answer 2

Answer:

(option c) 12km/hr is the right answer ✔️✔️

Step-by-step explanation:

Using formula

average speed = 2(a*b)/a+b

=> 2(15*10)/15 + 10

=> 2(150)/ 25

>300/25

=> 12km/hr