Question

Ablock of houses in a colony has 15 buildings each building has 7 storeys each storey has 4 flats and each flat has 3 rooms. How many rooms are there in the block

Answer 1

1 building = 7 storeys
15 buildings= 7 × 15
=105 storeys
1 storey = 4 flates
105 storeys = 105 × 4
=420 flates
1 flat = 3 rooms
420 flates = 420 × 3
=1260 rooms
if u any doubt regarding this please tell me .I am trying my best