Question

If cycling for 50 mins burn 150 calories then answer how many calories will u burn if u cycle for)i)40mins)ii)15mins)iii)30mins)iv)1hour)v)10mins)vi)45mins)vii)34mins

Answer 1

Assuming Calories are burnt at constant rate.

According to the question,
150 Calories are burnt/used up in 50 mins.
=> 3 Calories are burnt in 1 minute.

Now, By Unitary Method.
1) 40 mins :
1 minute ---> 3 Calories
=> 40 minute ---> 40 * 3 = 120 Calories.

2) 15 minutes :
1 minute --> 3 Calories
=> 15 minutes ---> 3 * 15 = 45 Calories.

3) 30 minutes :
1 minute ----> 3 Calories
=> 30 minutes ----> 3*30 = 90 Calories

4) 1 hour :
1 minute ---> 3 Calories
=> 1 hour = 60 minutes ---> 60 * 3 = 180 Calories

5) 10 minutes :
1 minute ---> 3 Calories
=> 10 minute ---> 3 * 10 = 30 Calories

6) 45 minutes :
1 minute ---> 3 Calories
=> 45 minute ---> 45 * 3 = 135 Calories.

7) 34 minutes :
1 minute ---> 3 Calories
=> 34 minutes ---> 3* 34 = 102 Calories.

Answer 2

As per as the question, 
In 50 minutes, number of the Calories burnt is 150.
∴ In 1 minutes, numbers of the calories burnt is 3.

(i) In 40 minutes, numbers of the calories burnt is 3 × 40
 = 120 Cal.

(ii) In 15 minutes, numbers of the calories burnt is 15 × 3
= 45 Cal.

(iii) In 30 minutes, number of the calories burnt is 30 × 3
= 90 Cal.

(iv). In 1 hrs. (60 min.), numbers of the calories burnt is 3 × 60
= 180 Cal.

(v). In 10 min, numbers of the Calories burnt is 10 × 3
= 30 Cal.

(vi). In 45 min, numbers of the Calories burnt is 45 × 3
= 135 Cal.

(vi). In 34 min, numbers of the Calories burnt is 34 × 3
= 102 Cal. 


Hope it helps.