Question

Tower T1 is 136,573 ft tall and tower T2 is 94,661 ft tall. How much taller is T1 than T2?

• A. 42,912 ft
• B. 41,822 ft
• C. 42,812 ft
• D. 41,912 ft

Answer 1

The correct option is D 41,912 ft

Say:
1. The height of tower T1 and T2 is given.

Steps:
1. What do we need to determine?
a. By how much T1 is taller than T2.
2. How will you determine it?
a. By subtracting each digit of 94,661ft from 136,573ft.(WB1)
3. What is the subtraction of 6, 6 and 1 digits from 7, 6 and 3 digits?
a. The subtraction of digits are 3 - 1 = 2, 7 - 6 = 1 and the subtraction of 6 from 5 is not possible. So carry the 1 from 6 and it will become 15, now 15 - 6 = 9. (WB2)
4. What do we get if we subtract 9 and 4 from 1, 3, and 5?
a. The subtraction equation is 5 - 4 = 1. The subtraction of 9 from 3 is not possible. So, we have to carry the 1 from 1 and it will become 13. Thus, 13 - 9 = 4. (WB3)
5. What is the final answer after subtraction?
a. 41,912. (WB3)
6. How much taller is T1 than T2? a. 41,912 ft (WB3)
Hence, Option C is correct.

WB:
(WB1)