我想这是选项 1...因为六月是在夏天
希望有帮助:)
Answer:
62 m
Step-by-step explanation:
let the height of tower=x
then
B. 7√10.
√40 = √4√10 = 2√10
√90 = √9√10 = 3√10
So √40 + 2√10 + √90
= 2√10 + 2√10 + 3√10
= 7 √10.
great
The correct answer is 2 found by my calculator.
