Ram covers a distance in 8 hours and Mohan covers the same distance in 4 hours. It speed of Mohan is 10 km/hr more than Ram, then which of the following statements is/are correct?
I. Speed of Mohan is 20 km/hr.
II. Sum of their speed is 30 km/hr.
Answer & explanation
Correct answer: option 2
As, distance is same . So , Speed is inversely proportional to time .
Ratio of Ram : Mohan
Time 8 : 4
2 : 1
Speed 1 : 2
According to question ,
1R = 10 km/h
2R = 2 × 10 = 20 km/h
So , Speed of Mohan is 20 km/h
Now , Sum of speed of Ram and Mohan = 1R + 2R = 3R
= 3× 10 = 30 km/h
Hence, I & II both follows .