Walking at 3/4 of his normal speed, a man takes 2(1/2) hours more than the normal time. Find the normal time.
7.5 h
6 h
8 h
12 h
Answers
Answered by
21
When his speed becomes 3/4
, his time would increase by 1/3
. Increased time = 2.5 hrs
Thus, the normal time = 7.5 hrs.
Answered by
19
Answer:
The normal time is 7.5 hours
Step-by-step explanation:
Assume normal speed as‘S’
Speed, S = distance / time = D / T
Normal time, T = D / S
From the given statement,
Walking at 3/4 of his normal speed, a man takes 2(1/2) hours more than the normal time.
(3/4) S = D/2.5+T
D / S = (3/4) (2.5 +T) = 0.75 (2.5 + T)
T = 1.875 + 0.75T
T (1-0.75) = 1.875
T = 1.875/0.25
T = 7.5 hours
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