Question

Question number 4 its urgent.

Answer 1

Answer:

(i) 105 km

(ii) 2 h 24 min

(iii) 20 h

Step-by-step explanation:

v = 45 km / h

(i) t = 2 h 20 min = ( 2 + 20 / 60 ) h = 7 / 3 h

Distance s = v t = ( 45 km / h ) × ( 7 / 3 h ) = ( 45 × 7 / 3 ) km = 105 km

(ii) s = 108 km

t = s / v = ( 108 km ) / ( 45 km / h ) = ( 108 / 45 ) h = 2.4 h

= 2 h + ( 0.4 × 60 ) min

= 2 hr 24 min

(iii) s = 900 km

t = s / v = ( 900 / 45 ) h = 20 h