Mr. Isaac rides his bicycle at the rate of 10 miles per hour for 30 minutes. If he rides for another 15 miles, rests for 30 minutes, and then covers the remaining distance of 20 miles, what's the total time in minutes took to travel the whole journey?
If in one hour he covers 10 miles and rides for 15 miles at the rate of 10 miles per hour, then the time taken for the 15 miles will be 15/10 = <<15/10=1.5>>1.5 hours.
The time in minutes is 1.5 * 60 = <<1.5*60=90>>90 minutes.
The time taken for the remaining 20 miles at a rate of 10 miles per hour is 20/10= <<20/10=2>>2 hours.
The time in minutes is 2*60 = <<2*60=120>>120 minutes.
The total time taken for the whole journey is the first 30 minutes + 90 + 30 minutes for resting +120 minutes = <<30+90+30+120=270>>270 minutes.
#### 270