Abhishek is 168cm tall and Avinash is 1m 78cm tall. What is the difference between their heights?
A tower is 112 m 50 cm tall and another tower is 175 m 75 cm tall. What is the difference in their heights?
A 10 cm tall candle, when viewed using a convex lens, appears to be 20 cm tall. The focal length of the lens is 5 cm. What is the object distance?