Question

8. A mason can build a 15 cm thick wall in 5 hours, How much time will he
take in building i.e.12 cm thick wall assuming the other dimensions
the same?
(b) 4 hours
(a) 3 hours
(c) 3 hours
(d) 4 hours​

Answer 1

Answer:

15 cm thick wall take 5 hrs so 12 cm thick wall will take

let the hours be x so,

15× x =12×5

15x =60

x=60÷15

=4

therefore x is equals to 4 hours

so option a) is correct