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.

Both I and II

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 .