Physics, asked by rameshmath9233, 11 months ago

Two cars x and y start from two places a and b respectively which are 840km apart at 9
a.M. Both the cars run at an average speed of 60 km/hr. When do these two cars cross each other?

Answers

Answered by abhi178
2

car x and car y cross each other at 4 : 00 P.M

speed of both cars is same i.e., 60 km/h

as both are moving in opposite directions. so relative speed of cars = 60 + 60 = 120 km/h

seperation between car x and car y = 840km

time taken to cross each other , t = seperation between cars/relative speed of cars

= 840 km/(120 km/h)

= 7 hrs.

so, time when they cross = 9:00 A.M + (7hrs) = 4:00 P.M

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Answered by Anonymous
0

\huge\bold\purple{Answer:-}

(b) Distance travelled by X upto 11 a.m. = Distance

travelled by X upto 10 a.m. = 60 × 1 = 60 km.

Distance travelled by Y upto 11 a.m. = 2 × 60 = 120

Now, at 11 a.m., distance between X and Y

= 700 – (120 + 60) = 520 km.hr.

Relative speed of X with respect to Y

= 60 – (–60) = 120 km/hr.

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