Question

5. Three friends Thomas, Harry and James went for the marathon and start their run at 6 A.M. and run through planes and hills on their way and return at 12 P.M. If their speed on the plane ground is 4 km/h, up the hill it is 3 km/h and down the hill it is 6 km/h. Find the total distance they cover during the whole journey. (A) 15 km (B) 10 km (C) 12 km (D) 18 km (E) None of these​

Answer 1

Answer:

Correct answer is Option D 18

Step-by-step explanation:

First I'll explain the problem and then you'll understand it

Total time = 12Pm-6 Pm

= 6 hours

Given,

If in 1 Km it takes 6 hours to travel,

Then for 4 km/hr it takes = 4x6= 24 KM

If in 1 Km it takes 6 hours to travel,

Then for 3 km/hr it takes = 3 x 6 = 18 KM

If in 1 Km it takes 6 hours to travel,

Then for 6 km/hr it takes = 6x6 = 36 KM

According to question,

Total distance = (24+18)-36 = 18km

Hope this helps!