Question

The following statements compare the heights of four friends:


Find the correct representation of Charlie's height.

• A. (1.45 + 0.48 - 0.21 - 0.27) m
• B. (1.45 + 0.48 - 0.21 + 0.27) m
• C. (1.45 + 0.48 + 0.21 + 0.27) m
• D. (1.45 - 0.48 - 0.21 + 0.27) m

Answer 1

The correct option is A (1.45 + 0.48 - 0.21 - 0.27) m

Let's calculate the height of each of the four friends.

Mindy's height = 1.45 m

Harry is 0.48 m taller than Mindy.

∴ Harry's height
= Mindy's height + 0.48 m
= 1.45 m + 0.48 m

Now, Bill is 0.21 m shorter than Harry.

So, Bill's height
= Harry's height - 0.21 m
= (1.45 + 0.48 - 0.21) m

Finally, Bill is also 0.27 m taller than Charlie.
This means that Charlie is 0.27 m shorter than Bill.

Hence, Charlie's height
= Bill's height - 0.27 m
= (1.45 + 0.48 - 0.21 - 0.27) m

∴ The correct representation of Charlie's height is
(1.45 + 0.48 - 0.21 - 0.27) m