Questions

The Sahara is the largest non-polar desert in the world. The Sahara is the largest hot desert and the third largest desert in the world after Antarctica and the Arctic.

The desert covers large sections of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia. It covers 9 million square kilometers (3,500,000 sq mi), amounting to 31% of Africa.

Its borders include the Mediterranean Sea to the north, the Atlantic Ocean to the west and the Red Sea to the east.

Bicycle is a compound machine in the above given options. A compound machine is a machine that is formed by two or more simple machines.

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

No problem. We can use network marketing as an alternative. The company already has its strong network of customers who can spread the word about its products. They can encourage referral rewards for say every three customers who will buy our product or avail our service.

We can also announce a contest for the customers to buy the product and win a chance to get himself broadcasted for the product advertisement. We can ask them to send in their photo along with the contest application form which they get alongwith the product they buy. So we don’t have to pay them as we would otherwise have to pay to a celebrity.

Oligopoly is market structure where a small number of large firms are there. Oligopolistic industries are characterized by a few dominant firms and substantial entry barriers.

Ans.  Suppose the speed of boat in still water is x km/h and speed of stream is y km/h

Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i) 

Speed of boat in upstream = (x – y) km/h

x – y = 28 …(ii)

Add. Eqs. (i) and (ii), we get 2x = 60

x = 30 km/h

A production–possibility frontier (PPF) or production possibility curve (PPC) is the possible tradeoff of producing combinations of goods with constant technology and resources per unit time.

Flag is called as Low order rigister & Accumulator is called as High order Rigister.