Question

The temperature drops by 3°C in every one and half hour , current temperature is 12°C. How many hours will it take to reach 0°C?

Answer 1

Answer:

temp. time

3. 1.5

12. x

$3 \div 12 = 1.5 \div x \\x \times 3 = 1.5 \times 12 \\ 3x = 18 \\ x = 18 \div 3 \\ x = 6$