Exercise 12 (B) Question 7 - Selina Mathematic Class 6 – Idea of Speed, ...

A and B start from the same place, in the same direction and at the same time with speeds 6kmph and 2m\sec respectively.After 5 hours who will be ahead and by how much?

A′s speed=6kmph

B′s speed=2m\sec

Distance covered by A in 5 hours=6×5=30km

and distance covered by B in 5 hours=5×60×60×2=36,000m

=100036,000​=36km

B will be ahead and 36−30=6km ahead.