Fa o duela R40 ya sotlele ya tlhapi ya bogolo jwa 'foot-long' kwa Subway, o tla duela bokae go reka sotlele ya 'cold-cut combo' ya bogolo jwa 'six-inch' e e tlhatloganyo gararo go feta ya tlhapi?

When the water is cold Ray swims a mile in 16 minutes. When the water is warm Ray swims a mile in 2 minutes more than twice as long. How much longer does Ray take to swim 3 miles on a hot day than a cold day?
Fa o duela R40 ya sotlele ya tlhapi ya 'foot-long', go raya gore o tla duela 3*R40= R120 ya sotlele ya 'cold-cut combo' ya 'six-inch'.
Go raya gore o tla duela R120+R40 = R<<120+40=160>>160 ya dijo tsa motshegare. 
#### 160

Cold water mile = <<16=16>>16 minutes
Warm water mile = 2+2(16)=34 minutes
3 miles in cold water: 3(16)=<<3*16=48>>48 minutes
3 miles in warm water: 3(34)=<<3*34=102>>102 minutes
Ray takes 102-48=<<102-48=54>>54 minutes longer
#### 54