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Dear student,
Petrol is consumed on the basis of distance covered. First find the distance covered by both the cars.
Use distance= speed*time
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All the best.
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Askiitians Expert
Sagar Singh
B.Tech, IIT Delhi
distance travelled by car A = distance travelled by car B = 400Km
petrol required to travel X km = 1L for car A
pertrol required to travel X+5 km = 1L for car b
1L = X+5 km
1km = 1/ X+5
petrol required for B to travel 400km = 400/X+5
petrol required for A to travel 400km = 400/X
given that
400/X - 4 = 400/X+5
(400-4X)/X = 400/ X+5
(400-4X)(X+5) = 400 X -----------------------BY CROSS MULTIPLICATION
now solve the equation, you will get two answers .
the negative answer is omitted and the positive answer is taken as the petrol consumed by car A
add 4 to it and you will get the petrol consumed by car B
PLEASE APPROVE !
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