Question

If Rehan reduced his speed by 5 km/hr, he would
take four hours more to reach the destination. If he
increases his speed by 5 km/hr, he would take 2
hours less to reach the destination. Find the usual
time he takes.​

Answer 1

Answer:

If Rehan reduced his speed by 5 km/hr, he would

take four hours more to reach the destination.

Speed - 5 = d/(t+4)

If he increases his speed by 5 km/hr, he would take 2

hours less to reach the destination.

Speed + 5 = d/(t-2)

Difference both the equation

10 = d(1/(t-2) - 1/(t+4))

10 = d(t+4-t+2)/((t-2)(t+4))

10 = d(6)/((t-2)(t+4))

As there is distance is missing so, the solution will be a little bit complicated.