Question

The weight of seema was 85 kg. She lost 10 pounds. Find her present weight in kg.

Answer 1

Hint: Here firstly we calculate the weight in kilogram which is given in pounds then find the difference between the weights to get the present weight.
1 kg = 2.2 pounds

Complete step-by-step answer:
Given: weight of seema before losing = 85 kg and she lost = 10 pounds
2.2 pounds = 1 kg
Using unitary method
10 pounds = \[\dfrac{1}{{2.2}} \times 10\]kg
10 pounds = 4.55 kg
 Now, she has lost 10 pounds or 4.55 kg.
So, weight of seema after losing weight
                                 = weight of seema before losing – lost weight by seema
Then, substitute the value of weight
Weight of seema after losing = 85 kg – 4.55 kg

Weight of seema after losing = 80.45 kg

Note: In these types of questions, always convert the two given quantities in the same unit then only we can add or subtraction. Calculation must be done with accuracy i.e. in these types of conversion we will get a decimal number. Take all decimal numbers up to sufficient significant values. Whenever two different units are given their equivalent relation will be given or you must remember that equivalent relation, then only you will be able to solve these types of problems. Equivalent weights, distances value must be known. Example 8 km = 5 miles i.e. 8 kilometer distance is the same 5 miles distance. We cannot subtract miles from kilometers directly without changing units, either change km to miles or miles to kilometer.