We appreciate your visit to Miss Wan and Miss Lim left their school at 2 50 p m and drove along the same route to Orchard Road Miss Wan drove. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Answer:
a) 50 km/h
b) 3:26 p.m.
Step-by-step explanation:
You want to know Miss Lim's average speed and arrival time at Orchard Road if Miss Wan gets there in 30 minutes at 60 km/h, starting at 2:50 pm.
Distance
The distance Miss Wan traveled is ...
distance = speed × time
distance = (60 km/h) × (1/2 h) = 30 km
a) Speed
In the same 30 minutes that Miss Wan traveled 30 km, Miss Lim traveled 5 km less, so 30 -5 = 25 km. Miss Lim's speed was ...
speed = distance/time
speed = (25 km)/(1/2 h) = 50 km/h
Assuming Miss Lim maintained that speed for the remaining 5 km, her average speed for the journey was 50 km/h.
b) Time
Miss Lim's travel time is ...
time = distance/speed
time = (30 km)/(50 km/h) = 3/5 h = 36 min
The clock time 36 minutes after 2:50 pm is 3:26 pm.
Miss Lim reached Orchard Road at 3:26 p.m..
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