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ICSE-VIII-Mathematics

10: Direct and Inverse Variations Class 8 Maths

with Solutions -
Qstn# A-10 Prvs-QstnNext-Qstn
  • #10
    A train is moving with uniform speed of 120 km per hour. (i) How far will it travel in 36 minutes? (ii) In how much time will it cover 210 km?
    Ans : (i) Speed of train in 60 minutes = 120 km
    i.e., distance covered in 60 minutes = 120/60
    Distance covered in 36 minutes = (120 × 36)/60
    = 2 × 36
    = 73 km (ii) If distance covered is 120 km then time taken = 60 minutes
    If distance covered is 1 km them time taken = 60/120
    If distance covered is 210 km then time taken = 60/120 × 210
    = 105 minutes
    = 1 hour 45 minutes.
  • #10-i
    How far will it travel in 36 minutes?
    Ans : Speed of train in 60 minutes = 120 km
    i.e., distance covered in 60 minutes = 120/60
    Distance covered in 36 minutes = (120 × 36)/60
    = 2 × 36
    = 73 km
  • #10-ii
    In how much time will it cover 210 km?
    Ans : If distance covered is 120 km then time taken = 60 minutes
    If distance covered is 1 km them time taken = 60/120
    If distance covered is 210 km then time taken = 60/120 × 210
    = 105 minutes
    = 1 hour 45 minutes.