SOLUTION: a) The telephone poles along a road are 20m apart and a car travels from the first to the fifteenth in 10½ seconds. Calculate the speed of the car in km/h.
b) A tankful of wate
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-> SOLUTION: a) The telephone poles along a road are 20m apart and a car travels from the first to the fifteenth in 10½ seconds. Calculate the speed of the car in km/h.
b) A tankful of wate
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Question 1205401: a) The telephone poles along a road are 20m apart and a car travels from the first to the fifteenth in 10½ seconds. Calculate the speed of the car in km/h.
b) A tankful of water lasts 15 weeks if 3 litres a day are used.
How long will the tankful last if 10 litres a day are used?
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a) The telephone poles along a road are 20m apart and a car travels from the first
to the fifteenth in 10½ seconds. Calculate the speed of the car in km/h.
b) A tankful of water lasts 15 weeks if 3 litres a day are used.
How long will the tankful last if 10 litres a day are used?
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In this post, I will solve part (b), ONLY.
The governing equation is
15*7*3 = 10*d,
where 15 represents 15 weeks; 7 represents 7 day of a week; 3 represents 3 liters per day;
10 represents 10 liters per day and "d" represents days.
The equation expresses an idea that the consumed volume of water is the same in both scenarios.
From this equation
d = = 31.5 days = 31 days. ANSWER
