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Let C’s present age be x years. So, A’s present age = (x + 7) years And B’s present age = (x + 7 + 5) = (x + 12) years According to question, => x + 7 + x = 21 => 2x = 14 => x = 7 Required total sum = x + (x + 7) + (x + 12) = 3x + 19 = 40 years
A person has to travel a distance of 30 km. He finds that he has covered 5/6 of the distance in 3 hours and 20 minutes. what is his speed in km/h?
Identify the cases where two objects moving in opposite directions have a relative speed of 30 km/h.
Bus P takes 30 minutes to cover a distance of 60 km. If bus Q is 20% faster than bus P. Find the time taken by bus Q to cover the same distance?
A train is travelling at the rate of 72 km/hr. How many seconds it will take to cover a distance of 2/5 km?
Suniti goes to gym at a speed of 3 km/hr and returns back at a speed of 5 km/hr. If she takes 8 hrs in all. Find the distance between her home and gym.