House 1 is twice as tall as House 2. House 1 is 24 ft tall. How tall is House 2?

House 1 is TWICE as tall as house 2.....   House 2 is therefore 1/2 as tall as house 1    1/2 x 24 = 12ft tall

House 2 would be 48 ft because you multiply house 1 by 2 to get house 2.