Question

1.The length of a rectangular field is 100 m. If the perimeter is 300 m, what is its breadth?
a. 150m
b,50m
C.75m
d. 100m
2.A car travelling at a speed of 140 kmph covers 420 km. How much time will it take to cover
280 km?
a. 1 Hrs
b. 2 Hrs
c. 2 1/2 Hrs
d. 3 Hrs​

Answer 1

Answer:

1.

b)50m

2.

b)2hrs

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Answer 2

Answer 1:

It is given that length of rectangular field is 100m and we are also given the perimeter (length of boundary) of field to be 300m. We are asked to find the breadth of field. We can find it by applying formula for perimeter.

» Perimeter of rectangle=2(Length+Breadth)

Substitute given values

» 300m=2(100m+Breadth)

» 300m/2=100m+Breadth

» 150m=100m+Breadth

» 150m-100m=Breadth

» 50m=Breadth

So the required breadth of rectangular field is 50m.

___________________________

Answer 2:

Here in this question, we are given speed of car to be 140 km/he and we are asked to find the time taken by car to travel 280km. We can find the time taken by applying formula for speed.

» Speed=Distance/time

Substitute given values

» 140km/hr=280km/time

Cross multiplication::

» time×140km/hr=280km

» time=(280km)/(140km/hr)

» time=2hrs.

So the car will travel 280 km in 2 hrs.