Question

To cover a distance of 30 km, Rima takes 2 hours more than Sanjay. If Rima just doubles her speed, then she would take 1 hour less than Sanjay. What is Rima’s speed?

Answer 1

Answer:

answer is in the attachment

Answer 2

Given:

Total distance to be covered = 30 km

Time taken by Rima that is more than time taken by Sanjay = 2 hours

To find:

If Rima doubles her speed, then she would take 1 hour less. Find Rima's speed.

Solution:

Let Rima's speed be x km/hr and Sanjay's speed be y km/hr.

Then if she takes 2 hours more than Sanjay, the equation would be:

30/x - 30/y = 2 - equation 1

If Rima doubles her speed, the equation would be:

30/y - 30/2x = 1 - equation 2

On solving equation 1 and 2, we get:

x = 5 km/hr

y = 7.5 km/hr

Rima's speed is 5 km/hr.