Explanation

Cost Price (CP) = Rs. 5000  

Selling Price (SP) = Rs. 4000  

Loss = CP − SP = 5000 − 4000 = Rs. 1000

Loss % = (Loss / CP) × 100  

= (1000 / 5000) × 100  

= 20%

Explanation

Explanation

  Given:

- A + B can complete the work in 15 days

- B alone can complete the work in 20 days

Step 1: Work done per day

- (A + B)’s one day work = 1/15

- B’s one day work = 1/20

Step 2: A’s one day work

A’s 1 day work = (A + B)’s work - B’s work

= 1/15 - 1/20

Find LCM of 15 and 20 = 60

So:

= (4 - 3)/60 = 1/60

Final Answer:

A alone can complete the work in 60 days

Explanation

In mathematics, the empty set is the unique set having no elements; its size or cardinality is zero.

Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set, while in other theories, its existence can be deduced.

Explanation

1 Kg is equal to 1000 grams.

1 Kg is equal to 2.2 pounds.