Final answer:
Walt's height last year was 4.92 feet.
Step-by-step explanation:
To find out how tall Walt was last year, we need to subtract the growth he experienced in one year from his current height. Since he grew 10 cm in 1 year, his height last year was 1.6m - 0.1m = 1.5m. However, we need to convert this height to feet. Using the conversion rate of 12 in = 1 foot, we can calculate that Walt's height last year was 1.5m * (100 cm/1m) * (1 foot/12 in) = 4.92 feet.
Learn more about Calculating height from information about growth