How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1/2 m board?
Q1. How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1/2 m board?
Answer: 99
Explanation: Area of each stone = 2.5 × 2 = 5 m²; courtyard area = 30 × 16.5 = 495 m²; number of stones = 495/5 = 99.