Mathematics
Grade6
Easy

Question

A minibus drives with a constant speed of 45 miles in 3 hours. If it travels at the same rate, distance covered by the bus in 4 hours would be _________________.

  1. 25
  2. 31
  3. 51
  4. 60

Hint:

In this question, we are given the distance travelled by minibus in 3 hours. It is 45 miles. Using this data, we are asked to find the distance travelled by train in 4 hours given the rate is constant. We can try to find an equation using these quantities to get the value.

The correct answer is: 60


    The given values of distance and time are as follows:
    Distance = 45 miles
    Time = 3 hours
    We have to find the speed as it is given that speed is constant.
    We know the formula for speed.
    S p e e d space equals fraction numerator D i s tan c e over denominator T i m e end fraction
s u b s t i t u t i n g space t h e space v a l u e s comma space w e space g e t
S p e e d space equals space fraction numerator 45 space m i l e s over denominator 3 space h o u r s end fraction
space space space space space space space space space space space space space equals space 15 space m i l e space p e r space h o u r
    Now, as the rate or speed is constant we can use this value to find the value of distance travelled for any other time.
    We have to find the distance travelled in 4 hours.
    Let’s see the formula
    S p e e d space equals fraction numerator D i s tan c e over denominator T i m e end fraction
    Rearranging the formula to find distance. We will multiply both sides by time.
    Distance = Speed × Time
    = 15 miles/ hour × 4 hours
    = 60 miles
    Therefore, the distance travelled is 60 miles.
    So the option which is ‘60’, is the right option.

    For such questions, we should be careful about the units. Same quantities must have same units.

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