In a kingdom, the king donates wheat grains equal to 10 times his weight on his birthday. (b) If he had donated 780 kg of wheat grain on his last birthday, what was his weight last year?
Given: The king donates wheat equal to 10 times his weight. Wheat donated last year = 780 kg
Formula: King's weight = Wheat donated ÷ 10
Calculation: King's weight = 780 ÷ 10 = 78 kg
Answer: The king's weight last year was 78 kg.
Explanation
The chapter presents a word problem about the king who donates wheat equal to 10 times his weight. If he donated 780 kg last year, and this is 10 times his weight, then his weight last year = 780 ÷ 10 = 78 kg.
Solution Steps
Step 1: The king donates wheat equal to 10 times his weight
Step 2: Wheat donated last year = 780 kg = 10 × king's weight last year
Step 3: King's weight last year = 780 ÷ 10 = 78 kg