An increase of speed of 4km/h on a journey of 32km reaches the time taken by 4 hours. Find the original speed.

16km/hr

Step-by-step explanation:

The increase of speed happens over 4 hours;

t=4

The final speed is 32, to find the original speed, subtract the increase over 4 hours

32-4t

32-4(4)=16km/hr

you have 6 cupcakes

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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