Level: STD 09

**Problem 1**

Find the LSA, TSA and volume of a cube of side 5 cm.

Problem 2

Given

TSA = 216 sq. cm

a = ?

Formula

TSA = 6a^{2}

6 x a^{2} = 216

a^{2}= 216/6 = 36

Therefore, a = 6 cm

Problem 3

Problem 4

Problem 5

Given

Tank volume

a = 2 m

V1 = 2 x 2 x 2 = 8 m^{3}

Measured volume

h = 10 cm = 0.1 m

V2 = a^{2} x h = 2 x 2 x 0.1 = 0.4 m^{3 }

Rate per measure of 0.4 m^{3} volume = Rs. 50

Cost for 8 m^{3} volume of oil = 8 x 50 /0.4 = Rs. 1000

Problem 6

Problems for practice