Question 675359
let the building is x m
then mountain is x+750 m
if both the mountain and building were 7m lower, the mountain would be 16 times as high as the building
so x+750-7=16(x-7)
or x+743=16x-112
or 16x-x=743+112
or 15x=855
or x=57 m
so the building is 57 m
then mountain is 57+750 =807 m
ans