A kilo of bananas in the market is 5 pesos more than thrice the cost of a kilo of tomatoes. If a kilo of tomatoes costs 15 pesos, how much does a kilo of bananas cost?

A. 20 pesos
B. 35 pesos
C. 40 pesos
D. 50 pesos

To find the cost of a kilo of bananas, we set up the equation:

Cost of bananas = 3 * (cost of tomatoes) + 5

Substitute the cost of tomatoes (15 pesos) into the equation:

Cost of bananas = 3 * 15 + 5 = 45 + 5 = 50

Therefore, the cost of a kilo of bananas is 50 pesos. The correct answer is D. 50 pesos.