Answer:
100 minutes
Step-by-step explanation:
First lets find out total how many time they spent on those activities
He spent in driving: 3*60 + 1/4*60=195 minutes
He spent in gardening: 1*60 + 3/4*60=95 minutes
In this way by subtracting from minutes spent during driving to minutes spent during gardening we can know he spent 100 minutes longer
