Q14 of 30 Page 13

An alloy of tin and copper consists of 15 parts of tin and 105 parts of copper. Find the percentage of copper in the alloy?

In an alloy,


Amount of tin = 15 part


Amount of copper = 105 part


Total weight of alloy = 15+105 = 120


Hence,


Percentage of copper in alloy =


More from this chapter

All 30 →
12

Rohit deposits 12% of his income in a bank. He deposited Rs 1440 in the bank during 1997. What was his total income for the year 1997?

 13

Gunpowder contains 75% nitre and 10% sulphur. Find the amount of the gunpowder which carries 9 kg nitre. What amount of gunpowder would contain 2.3 kg sulphur?

 15

An alloy contains 32% copper, 40% nickel and rest zinc. Find the mass of the zinc in 1 kg of the alloy.

 16

A motorist travelled 122 kilometres before his first stop. If he had 10%of his journey to complete at this point, how long was the total ride?