That depends on the amount and the type. For the calories in tomatoes of various types, by weight and by size, and the calories in cucumber by weight and by size, see the page links, further down this page, listed under Related Questions.
Assuming that the tomato is red, ripe and raw, the average calories are listed here:
1 whole small tomato weighing approx 3.2 oz - 16 tomato calories
1 whole medium tomato weighing approx 4.3 oz - 22 calories
1 whole large tomato weighing approx 6.4 oz - 33 calories
1 Italian tomato weighing approx 2.2 oz - 11 calories
1 plum tomato weighing approx 2.2 oz - 11 calories
For both the romaine lettuce and the iceberg lettuce:
1 cup of shredded lettuce weighing approx 1.7 oz - 8 calories
Simply conduct the measurements and add them up.
38
400 calories
20 calories.
Tomatoes do not burn calories.
About 20 calories are in a half-cup of tomatoes.
NO!
About 60 calories or so.
80 calories
There are roughly 17.5 calories in 3.5-oz. of tomatoes.
50
3
You probably wont die. Foods like Cucumbers and tomatoes have a very low calorie content so you can consume those and that's a 100 calories a day.
Calories in 1 pound of tomatoesThere are:Approx 5 calories in each 1 oz or 28g of tomatoApprox 80 calories in 1 pound of tomatoes.