Hello, Sadaf!

Kareem took 5 hours to drive 470km from Sudbury to Brantford.

For part of the trip, he drove at 100km/h. For the rest of the trip he drove at 90km/h.

How far did he drive at each speed?

Let = times he drove at 100 km/hr.

Then = time he drove at 90 km/hr.

He drove hours at 100 klm/hr.

. . His distance was: . km.

He drove hours at 90 km/hr.

. . His distance was: . km.

His total distance was 470 km.

There is our equation! . . .

Can you finish it now?