Question 6
A worker makes a two-step staircase from 12 cubic blocks as shown. He covers all surfaces except the bottom with square tiles of side 15 cm. Find the total tile area in m².
Source clarification: the block side length is not explicitly stated. Use the intended model of one 15 cm square tile per cube face. The source asks for m² but prints the mixed-unit options below; retain them and compare by unit conversion.
Source clarification: the block side length is not explicitly stated. Use the intended model of one 15 cm square tile per cube face. The source asks for m² but prints the mixed-unit options below; retain them and compare by unit conversion.