Question Answers

In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (i) Mohan gets four correct and six incorrect answers. What is his score? Find the product In a class test containing 10 questions using suitable [...]

A certain freezing process requires that room temperature be lowered from 40 degree C at the rate of 5 degree C every hour. What will be the room temperature 10 hours after the process begins ? A certain freezing process requires that room temperature be lowered from 40 degree C at the rate of 5 [...]

Find the product, using suitable properties: h) ( – 57 ) × ( – 19 ) + 57 Find the product using suitable properties: h) ( – 57 ) × ( – 19 ) + 57 October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,

Find the product, using suitable properties: g) ( – 17 ) × ( – 29 ) Find the product using suitable properties: g) ( – 17 ) × ( – 29 ) October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,

Find the product, using suitable properties: f) 7 × ( 50 – 2 ) Find the product using suitable properties: f) 7 × ( 50 – 2 ) October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,

Find the product, using suitable properties: e) 625 × – 35 × ( – 625 ) × 65 Find the product using suitable properties: e) 625 × – 35 × ( – 625 ) × 65 October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,

A hole is made at the bottom of the tank filled with water (density 1000 kg/m^ 3 ), If the total pressure at the bottom ofthe tankis 3 atmosphere ( 1 atmosphere = 10 ^ 5 N/m ^2 ), then the velocity of efflux is : A hole is made at the bottom of the [...]

Find the product, using suitable properties: d) ( – 41 ) × 102 Find the product using suitable properties: d) ( – 41 ) × 102 October 7, 2020 Category: Chapter 1 - Integers , Maths , NCERT Class 7 ,

Water from a tap emerges vertically downwards with an initial velocity V0. Assume pressure is constant throughout the stream of water and the flow is steady. Find the distance form the tap at which cross-sectional area of stream is half of the cross-sectional area of stream at the tap. A wooden block is floating in [...]

Find the product, using suitable properties: c) 15 × ( – 25 ) × ( – 4 ) × ( – 10 ) Find the product using suitable properties: c) 15 × ( – 25 ) × ( – 4 ) × ( – 10 ) October 7, 2020 Category: Chapter 1 - Integers , [...]