Question

a vehical running at a speed of 48 km/hr takes 6 hours to complete the journey if it's speed is 72 km/hr then time taken how much hours​

Answer 1

Answer-According to the question, a vehicle running at a speed of 48 km/hr takes 6 hours to complete the journey. it means total distance covered = 288 km. or, Time = 288/72 = 4 hours.

Answer 2

$\huge{ \underline{ \sf {Aɴsᴡᴇʀ -}}}$

$\sf \: At \: first, \\ \sf \: Speed \: of \: Vehicle = 48 \: km {h}^{ - 1} \\ \sf \: Time \: taken = 6 \: hours \\ \boxed{ \underline{ \gray{ \sf \: Distance = Speed × Time}}} \\ \sf \: = 48×6 \\ \green{ \sf \: = 288 \: km} \\ \\ \sf \: Now, \\ \sf \: Speed \: of \: the \: vehicle = 72 \: km {h}^{ - 1} \\ \sf \: Distance = \green{288 \: km} \\ \boxed{ \underline{ \gray{\sf \: Time = \frac{Distance}{speed} }}} \\ \\ \sf \: = \frac{ \cancel{288} \: ^{4} } { \cancel{72}} \\ \boxed{ \red{ \sf{ \implies{4 \: hours \: ...(ans)}}}}$