Question

Find the ratio of each of the following 

(a) 30 minute to 1.5 hours 

(b) 40 cm 1.5 m.

Answer 1

(a) 30 min to 1.5 hours ( ∵ 1 hours = 60 min ) 

= 30 min : 1.5 × 60 min 

= 30 min : 90 min 

= 30 : 90 

= 1 : 3 [Divide first and second quantity by their H.C.F. = 30] 

(b) 40 cm to 1.5 m, ( ∵ 1 m = 100 cm ) 

= 40 cm : 1.5 × 100 cm 

= 40 cm : 150 cm 

= 40 : 150 

= 4 : 15 [Divide first and second quantities by their H.C.F = 10]