Please answer these as soon as possible. I will mark yours as the brainliest and i will follow you. 1) a man completed a trip of 136 km in 8 hours. Some parts of the trip was covered at 15km/hr and the remaining at 18 km/hr. find the part of the trip covered at 18 km/hr. 2) The difference of two numbers is 3 and the difference of their square is 69. find the numbers.
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You have to mark your answer on Answer sheet provided with the ... Rough work can be done any where in the question booklet. ... of 4 km per hour and a part on a bicycle at the rate.
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A man completed a trip of 136km in 8 hours. Some parts of the trip was covered at 15km/hr and the remaining at 18km/hr. Find the part of the trip covered at 18 km/hr.
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# total trip time = 8 hrs.
total trip distance = 136 km.
Let x distnce covered @ 15 km/h.
y distance covered @ 18 km/h.
So :- x+y = 136 (1).
15x+18y=8⇒9064+54=8⇒6x+5y=720 __ (2)
By (1) & (2).
6x+6y=816
6x+5y=720
___________
y=96.
& x=136−96=40
x=40
So :- 40 km by 15km/h & 96 km by 18 km/h
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