A car averages 55 mph for the first 4 hours of a trip and
averages 70 mph for each additional hour. The average speed
for the entire trip was 60 mph. How many hours long is the trip?
Answer Posted / mohitkuldeep
let total time = x hrs
55*4 + 70*(x-4) = 60*x
10x = 60
x =6
answer is 6 hrs
Is This Answer Correct ? | 16 Yes | 1 No |
Post New Answer View All Answers
a, b, b, c, c, c, d, d, d, d, . . . . . . Find the 288th letter of this series?
there are two categories of persons in ratio a:b = 2:3. A type earns 2.5 dollars/hr and b type 1 dollar/hr total money earned by both is 24dollars. Then what is the total number of persons
Each row of letters or numbers has a rule connecting them. Write the next number or letterin the brackets. N , O , M , P , L , Q , K , R , (_ _ _)
In a 10 digit number, if the 1st digit number is the number of ones,2nd digit number is the number of twos, and ... so on. 10th digit is the number of zeroes,then find the number
A person needs 6 steps to cover a distance of one slab. if he increases his foot length(step length) by 3 inches he needs only 5 steps to cover the slabs length. what is the length of the each slab.
A man, a woman, and a child can do a piece of work in 6 days. Man only can do it in 24 days. Woman can do it in 16 days and in how many days child can do the same work?
he hour hand lies between 3 and 4. Tthe difference between hour and minute hand is 50 degree.What are the two possible timings?
There are 3 societies a,b,c. a lent tractors to b and c as many as they had. After some time b gave as many tractors to a and c as many as they have. After sometime c did the same thing. At the end of this transaction each one of them had 24. Find the tractors each originally had.
A speaks truth 70% of the times, B speaks truth 80% of the times.What is the probability that both are contradicting each other is ?
maths
What is the angle of degree suspended when two hands of clock showing the time 2.30.
In the 4 digits 1,2,3,4 how many 4 digited numbers are possible which are divisable by 4? Repetetions are allowed
there were three suspects for a robbery that happend in a bank, tommy, joy and bruceEach of them were saying that I haven't done anything and the other two has done it.police found that tommy was lying .who is the thief.
In a party there are women and cats.There are 18 heads and 72 legs altogether. How many women and cats?
There are 4 married couples out of which 3 a group is needed . But thier should not be his of her spouse .How many groups are possible ?